You're making the assumption it's all about NIL for dollars that haven't been spent yet and certainly not communicated to the players involved.
Yes NIL is part of the problem, but I also don't see another team breaking any banks guaranteed for Burks so unless someone broke rules and told him come to us and we will give you a nice chunk of money, I'm guessing he left for a chance at an offense he thinks will showcase him more. He's a confident dude, he may think he has NFL talent. I don't, but my opinion doesn't matter.
Again, it's a loss but if we replace him and others with better players then no biggie. If we don't, one of our biggest problems is worse.