I dont really believe this. I just think teams will always feel pressure when they have a top 5 player and the Lakers have looming max cap-space to steal your guy.
I think the most logical explanation is what is reality.
Nico is probably a power hunger FO member who didnt like Doncic much and didnt want to be beholden to him and his demands in the future (because when you have a star like that they probably run the organization more than you do). He sees a 2-3 year window to win and wants to try around the team he built. If it fails, he probably gets fired and moves onto something else outside of being a FO member. If it works he gets to be a genius.
Im just perplexed he didnt push harder to at the very least get Knecht.