we now know the key to NBA success is not to play ANY of your first round picks
The key to NBA success is to
1) Commit to the draft, even when you have lean years where it doesn't work out
2) Get the Full Bird Rights to as many players as possible, even if you don't end up using them
The Warriors drafted Curry, Thompson and Green. The first two had their full Bird Rights implied by the end of their third season on their rookie deals. Green was a 2nd round pick, so his situation was a little different, but again, the league structure rewards teams who stick to the draft and draft well.
The GSW could only go after Durant because Curry signed a below market deal because of his ankle problem, there was a massive influx of cap space due to no smoothing option taken during a two year spike period, the team had run an extremely clean cap sheet for a long time and all the critical players, including Iggy and Livingston, had their full Bird Rights with the Warriors.
Kuminga, Moody, Wiseman and Poole were all first round picks. Barring some trade, they'll all earn their Full Bird Rights with this team. This makes them more valuable in trades and it allows the Warriors to go over the cap to resign them.
Your beloved Celtics signed Al Horford and Gordon Hayward as street free agents. The team was fortunate that Tatum and Brown were on rookie deals. The system only really allows you to practically sign one pure street max type player who is not coming over with his Full Bird Rights. It's too difficult to negotiate the salary cap and get real help with lots of street free agents.
You need depth to win and if you hit on enough of your picks, you have control controlled young players who can operate as trade pieces or valuable rotation weapons. This is the pure principle of "cost certainty" that Bill Walsh was always talking about.
In crunch time and in the playoffs, what helps teams win is "synergy" Green, Curry, Thompson and Iggy have played together a long time. They know what the other guys are going to do on the court. The Spurs had this advantage as well in their later championships. Hodge podge teams like LeBron James constructs always falter because you don't have that continuity. It wasn't a surprise the Clippers failed with Paul George and Kawhi Leonard. Those guys didn't really play together very much and they didn't gel ( mostly because Leonard is a crybaby whiner and got to decide when he would practice and how often he did "load management")
How do you get guys to play together a long time? You have to draft them. There really isn't any other mechanism to have guys build tenure together and stay within the threshold of the salary cap.
The Knicks? Look how many years they jettisoned their first round picks. For 20 years that team was a wasteland. But now they are doing better and now they operate with a surplus of draft assets. The Lakers have been hemorrhaging draft picks since LBJ took over that team and look how badly he's driven that team into the ground. LeBron James could have 10 championships by now. If he had stuck to just one team, got a real solid GM like a Morey and just gotten out of the way.
Why do you think Steph Curry is smiling all the time? He's not trying to be a wannabe GM. He doesn't have that ego. He doesn't have the toxic Isaiah Thomas, Michael Jordan or Lebron James type narcissism. Wardell just chills out and let's Bob Myers figure it out. And when Jerry West was there, he just let the Logo figure it out.
One of the big problems for your beloved Celtics is that Tatum is now the kind of player who wants to make demands. One job is hard enough, some of these egomaniacs want to also run personnel.
I've always liked you wikkid, but the way you talk about basketball is why teams start hiring young GMs and young front office guys and young analytics guys. Getting nostalgia about the old school way of how people played the game without the context of what is going to work in today's game is a fast road to losing. That's why Jordan failed so long with the Hornets ( until he got a real GM and left him alone) and why Phil Jackson failed with the Knicks.
The Warriors are a team with wealth that keeps getting richer all the time. Because fundamentally they are run on the basic principle that there's what you want in an ideal sense and then there's what's actually in front of you. Golden State deals with reality, what's in front of them, even when it's ugly, that's how they adapt and overcome.