We have:
Lee
Gallo
Chandler
Walker
Douglas
And even Barron, Sergio, Giddens to a degree although I doubt any more than 1 of them will return.
We don't need another young player. We need star talent. How many young players do we want to develop? Are we an NBDL team now? A farm? No, we're not. If I recall, Pitino tried that with the Celtics, putting together essentially a college team and they played the college game in the NBA - citing that teams wouldn't know how to counter it. That didn't work so why would we want to try that here? And yes, that's what we'd be doing by adding picks upon late round picks.
A team filled with these caliber players will never win. You also don't just expect youth to improve every year without limits. It doesn't work that way.
Besides for every Chandler, Lee, Douglas you also get your Balkmans and Collins. You can't just expect to find gold in every late 1st round pick and you can't tell me with a straight face you want a team full of Chandlers and think it'll go anywhere. It wouldn't.
If this was the team's plan (and it isn't) to just rebuild with youth then we wouldn't have traded our pick and a pick swap to Houston.
We have a nice youthful core but we need to add star power to it not more youth.
We have a handful of young players we are in the process of developing. We have enough. You have too many kids you can't develop them all. You interfere with the development of some to try to get all involved. It's not a good idea.
We need to keep developing who we have but add some star power and then fill out the roster with utility veterans not more kids.