All stats have some sort of value. Even the dreaded +/-. They all have a story to tell. Just to use the "dumb stat" +/-, there is absolutely an amount of value, however small, when comparing players on the same team. Obviously, other stats tell better, deeper stories.
There is one big pitfall that I see happening with G & xG and the like, for and against, raw, %, per 60, or whatever. Let's say a guy has a better G% than xG%. There's a chance that the guy simply bucks the trend and is more effective than the formula expects. There's also the chance that the guy has had some puck luck and should regress to the mean over time. There's no true predictive answer.
If you flip a coin and get 3 heads in a row, the next flip is still 50/50. Once there's a human element involved, then it becomes a conundrum like the Sicilian in Princess Bride where it could be argued that he's both "on fire," and/or "due for a loss."
A guy has a breakout season at 27. We're all idiots arguing whether he's taken the next step as a player, or just had a one-hit wonder year. One side is going to be right 5 years down the road, but it doesn't make them "smarter" than the other side. If it were that easy, then chart heads could just print money using a betting app.
I try to acknowledge both possible outcomes, but "hope for the best" with our guys. It's healthier for my mentals. LOL
I was laughing at people ready to dump Laffy in the offseason, and I'm ready to laugh at Kakko haters this summer. I might be wrong, but I'd rather be wrong than a total downer like some. =)