That was one example. Every draft has at least one or two franchise players. Last year was Parker and Wiggins, year before that was Nerlens Noel, Year before that was Anthony Davis, Damian Lilliard, and Andre Drummond. You cant win championships drafting Kelly Olynyks every year.It also doesnt matter if the actual player is valuable.
A top 3 pick is inherently very very valuable in the NBA. You can use it to trade for a Kevin Love.
Are you actually a fan of the Celtics, you know, the franchise that won a championship in 2008 after its GM traded for
Kevin Garnett (a much more valuable player than Love) using a package centered on a player picked
1st 2nd 3rd 15th? Do you follow some other team, or do you just have amnesia? Yes, a higher pick is usually more valuable, in general. But it's quite possible to score a franchise player without using your own pick to draft at the top of the lottery. If your premise says otherwise, then everything else you argue on top of that premise is wrong. Proven wrong, by recent history, the recent history of this same franchise, led by the same GM.
Anyway, none of the players you just mentioned there have even
sniffed a Finals yet. They are evidence of
nothing so far. In fact, there are only six teams in the entire league that've won a championship since 1999. Spurs, Lakers, Pistons, Heat, Celtics, Mavs. Only stars on those teams drafted higher than ninth by the team they won a title with: Duncan, Wade. That's it. 16 years of championships, and only two players fit your paradigm of The Only Way to Win a Championship. Your paradigm fails.
There are multiple paths to building a championship roster, because there are multiple paths to acquiring championship talent. Not just drafting high.