Kobe's on-court value to his team simply wasn't at a level that would warrant consideration as a top 10 player of all time
Even at his peak he had nowhere near the positive impact on the court that his reputation would lead you to believe
Look at the career highs that some of his contemporaries were able to achieve:
Harden's career highs:
30.6 PER, 16.4 Win Shares, .289 WS/48, 11 BPM, 9.3 VORP
Durant's career highs:
29.8 PER, 19.2 Win Shares, .295 WS/48, 10.2 BPM, 9.6 VORP
McGrady's career highs:
30.3 PER, 16.1 Win Shares, .262 WS/48, 10.5 BPM, 9.3 VORP
Chris Paul's career highs:
30 PER, 18.3 Win Shares, .292 WS/48, 11 BPM, 9.9 VORP
Garnett's career highs:
29.4 PER< 18.3 Win Shares, .272 WS/48, 10.2 BPM, 10 VORP
Shaq's career highs:
30.6 PER, 18.6 Win Shares, .283 WS/48, 9.3 BPM, 9 VORP
Jokic's career highs:
32.8 PER, 15.6 Win Shares, .301 WS/48, 13.7 BPM, 9.8 VORP
Nowitzki's career highs:
28.1 PER, 17.7 Win Shares, .278 WS/48, 8.3 BPM, 7.9 VORP
Curry's career highs:
31.5 PER, 17.9 Win Shares, .318 WS/48, 11.9 BPM, 9.5 VORP
LeBron's career highs:
31.7 PER, 20.3 Win Shares, .322 WS/48, 13.2 BPM, 11.8 VORP
Kobe's career highs:
28 PER, 15.3 Win Shares, .224 WS/48, 7.6 BPM, 8.0 VORP
Kobe only comes out ahead against one player, in one category. His 8.0 VORP beats Nowitzki's mark of 7.9, however, Kobe played 188 more minutes in his season, or the equivalent of about 4.5 games
Here's a list of Kobe's contemporaries who have lead the NBA in an advanced stat at least 5 times:
McGrady
Durant
Paul
Curry
LeBron
Garnett
Harden
Giannis
Shaq
Nowitzki
Duncan
The number of times Kobe lead the league in an advanced stat = 0
For comparison sake, Shaq lead in an advanced stat 20 times, LeBron 43 times, while Jordan lead 61 times
And Kobe's reputation as an elite defender isn't based in reality either
He had 11 seasons with a negative DBPM, and his career high of 1.6 was the only time in his career that he finished a season above 1
Jordan had just one season with a negative DBPM in his career, his first year in Washington when he finished -0.1. His career high was 4.2, and he had 9 seasons where he finished above Kobe's personal best of 1.6
LeBron's career high was 3.7, and he had 13 seasons at or better than Kobe's personal best of 1.6. And the only time LeBron finished with a negative DBPM was as a rookie
Now, let's take a look at the playoff numbers of some players during their prime, shall we?
Kobe '99 - '13 (178 games)
22.8 PER, .544 TS%, 5.8 BPM, .164 WS/48 (2 playoffs with a WS/48 above .2, career high of .26)
Lead the playoffs in VORP 2x, WS 1x
Shaq '95 - '04 (155 games)
28.3 PER, .568 TS%. 6.9 BPM, .212 WS/48 (7 playoffs with a WS/48 above .2, career high of .26)
Lead the playoffs in PER 4x, OWS 3x, DWS 2x, WS 3x, WS/48 2x, OBPM 1x, VORP 2x
Paul '08 - '22 (142 games)
23.6 PER, .587 TS%, 6.9 BPM, .193 WS/48 (6 playoffs with a WS/48 above .2, career high of .322)
Lead the playoffs in PER 3x, OWS 1x, WS/48 3x, OBPM 2x, BPM 2x
Duncan '98 - '15 (241 games)
24.6 PER, .549 TS%, 6.0 BPM, .197 WS/48 (7 playoffs with a WS/48 above .2, career high of .279)
Lead the playoffs in PER 2x, OWS 2x, DWS 1x, WS/48 1x, DBPM 2x, BPM 1x, VORP 2x
Harden '13 - '21 (94 games)
24 PER, .584 TS%, 7.7 BPM, .182 WS/48 (3 playoffs with a WS/48 above .2, career high of .263)
Lead the playoffs in OBPM 1x
Wade '05 - '12 (97 games)
24.9 PER, .565 TS%, 7.4 BPM, .193 WS/48 (3 playoffs with a WS/48 above .2, career high of .24)
Lead the playoffs in PER 1x, TS% 1x, DWS 1x, OBPM 1x, BPM 1x, VORP 1x
Durant '11 - '21 (145 games)
24.9 PER, .604 TS%, 7.4 BPM, .205 WS/48 (7 playoffs with a WS/48 above .2, career high of .28)
Never lead the playoffs in any advanced statistic
Nowitzki '01 - '12 (128 games)
24.7 PER, .584 TS%, 6.6 BPM, .205 WS/48 (6 playoffs with a WS/48 above .2, career high of .291)
Lead the playoffs in PER 1x, OWS 2x, WS 1x, WS/48 3x, OBPM 1x, BPM 1x, VORP 1x
Curry '13 - '22
23.2 PER, .608 TS%, 7.1 BPM, .195 WS/48 (3 playoffs with a WS/48 above .2, career high of .272)
Lead the playoffs in WS 1x, VORP 2x
Leonard '03 - '21 (121 games)
25 PER, .621 TS%, 8.5 BPM, .232 WS/48 (5 playoffs with a WS/48 above .2, career high of .314)
Lead the playoffs in PER 2x, OWS 1x, DWS 1x, WS 1x, WS/48 1x, OBPM 1x, BPM 2x, VORP 1x
LeBron '06 - '20 (260 games)
28.4 PER, .584 TS%, 10.2 BPM, .245 WS/48 (10 seasons with a WS/48 above. 2, career high of .399)
Lead the playoff in PER 5x, OWS 8x, DWS 4x, WS 9x, WS/48 4x, OBPM 5x, BPM 5x, VORP 9x
Jordan '85 - '98 (179 games)
28.6 PER, .568 TS%, 11.1 BPM, .255 WS/48 (9 playoffs with a WS/48 above .2, career high of .333)
Lead the playoffs in PER 6x, OWS 7x, DWS 1x, WS 7x, WS/48 5x, OBPM 8x, DBPM 1x, BPM 9x, VORP 8x
Please note that in an attempt to provide an accurate representation of a player's playoff value during their prime, their prime was considered to have ended once there was a noticeable drop in their playoff production after the age of 30. For example, despite Kobe's 2012 regular season being more or less in line with other seasons from his prime, there was a significant drop in his playoff production from the year before, so 2011 would be viewed as the final season of his prime
So, of the 12 players listed above, Kobe has the lowest PER, TS%, BPM, and WS/48 in the playoffs during their primes
If Kobe was worthy of consideration for a Top 10 All Time list, the stats would support that, but they don't