The problem with your logic is that every team drafting, especially those with top 10 picks is looking to "draft a stud".....how often does that happen, relative to having a higher pick? If this were somehow a guarantee, your argument is obviously without flaw. Draft two "studs" back to back and have them under controlled contracts. Hopefully every key player on the team as assembled is retained, so we remain competitive as the youth (Smart, Brown, Rozier, Stud 1, Stud 2) all develop together, and we magically are able to keep them all. Zizic, Nader, Yabu also start killing it...
It's just way too much going on in reality, IMO. Too much youth, which isn't a BAD problem to have at all, but it is simply a quality over quantity thing. You need stars to win championships, period. Every 20 years or so, a true balanced team finds their way in some sport, and usually it's baseball. The NBA is predicated on the top 25 or so players ruling every game they play in.
Generally, most of them are that much better than every other player in the league. I would say we currently have 1, and a borderline 2nd in Horford. Are 1 star (IT) also happens to be one of the most noticeable outliers due to his size.
Most teams winning championships have at least 2, if not 3 or 4 of these players.
The Celtics window is NOW and the next 2 years, while everyone is under contract, and their current deals are affordable. After that, whether they stay or not is dependent on our cap situation. I do agree that we need to develop our youth movement, however, it absolutely needs to be consolidated, and the staff must choose which players to retain and focus on.