Why don’t player jerseys exist?

I’m assuming it’s something to do with the CBA or contract or something? It’s really annoying that I have to choose between shitty generic $39 jerseys or game worn jerseys that sell at auction for $2k+.

I get that players are moved around/cut a lot but you can’t tell me that selling $129 jerseys for veteran players or guys that have been on the team a certain amount of time or something wouldn’t be practical or profitable?

Anyone know why?

Edit: sounds like this policy varies by team and I naively assumed it was league-wide