Pelicans aren't tanking this year for draft picks, they traded it for Queen from Hawks (last year 13th pick) , and it is unprotected.
There are rumours about them relocating, but it is based on false narrative that the Arena is empty, they are never in the bottom five in attendance. They are just bad franchise.
Zion isn't interested in the Knicks and they aren't interested in him. He plays well because David Griffin has done one good thing: he made Zion contract is not guaranteed. Zion has to play well to get his money, otherwise he will be cut and he will be getting MLE at best.
Ben Simmons had guaranteed contract, as you said he quit after 2021 and just had to be there just to get paid. He was a scammer at the end.
Zion will follow route, unless he grows up. Only thing holding him is that they can cut him if they want without paying him. I bet he wouldn't be putting those numbers if he didn't have that clause