Your argument is just as debatable. You ignore the James Hardens of that period but let me remind you.
The Whiteboard: Are the NBA’s new foul rules hurting James Harden? . It looks like the NBA had to shut down that type of play which was popular. It seems like the 3 point onslaught started with Mike D'Antoni though.
What was "the Warriors style?" Play 4 All Stars against 2-3 and abuse that advantage to ensure someone couldn't be defended? That sounds like the Lebron style but with just another All Star added. Nothing special about that honestly.
Out of the top 20 teams who have attempted the most 3 pointers, 4 of them were Warriors teams and they were the last 4 years played. None of them were the "ball movement, 3-point style of the 2010s" that you suggest. Three of them were the last 3 years of Celtics teams. Four of them were the 2016-2020 Rockets though. In fact, the Rockets are the only teams in the top 20 from before the 2021 season.
So, the most factual answer is that no one could afford to keep the 4 All Star solution of the Warriors, so they just imitated D'Antoni's teams and copied the system abuse he discovered.