The idea is that he hits his ceiling during that 3-5 years. This doesn't mean he is a non-factor in the NHL until then but rather he isn't scoring 70 points in the NHL during his D+1 or 2 season.
The Kings can do that if they believe in the center depth of the pipeline along with the length of Kopitar's effectiveness.
Put it this way: the Kings aren't winning the Cup this year if they drafted TS instead. Probably not next year either. If QB winds up being the better player around that point, then it doesn't matter.
As for not playing right away, I still think he gets some NHL games this year. The Kings could be playing him right now if they wanted to since it isn't like he isn't athletic or big enough. Shit...Kaliyev got a game in and my boy MacDermid plays in NHL games and he is the slowest player in the league. It isn't the smart thing to do, however, because the Kings are taking a long term approach v. hoping the 2OA can come in this season and make them a contender all of a sudden. While TS is very good, he still isn't a Doughty level 2OA and even Doughty's awesome rookie season couldn't make the '09 team close to a contender. Anyways, the Kings could definitely have just tossed QB into the NHL this season but that's not the plan and thank goodness they haven't.
It's exciting to see this team not be as horrible as the past two seasons but, I mean, they still lost to the Ducks twice. There are a lot of holes on this team so everyone getting caught up in thinking this team is close needs to chill for a bit. When we look at this team's record, PP% and leading scorers, let us all not forget the mirage that was 2018. Thinking this team is almost legit because Brown and Kopitar are on career best pacing this deep in to their careers is foolish...so is ignoring this COVID schedule that led to a bunch of time off and then a lot less travel this season. I'm not raining on the parade because there are still a lot of positives to take from what we've seen so far but there is still a long way to go.