Hypothetical - before NIL:
A wrestler wants to transfer and he's courted by Penn State, Iowa and Ohio State. He ends up picking Penn State because he just watched them win NCAAs by 55 points and wants to win a team title and maximize his own chances of winning an individual title.
Hypothetical - after NIL:
A wrestler wants to transfer and he's courted by Penn State, Iowa and Ohio State. Penn State offers NIL $50,000. Iowa offers NIL $150,000. Ohio State offers NIL $100,000. He ends up picking Penn State because he just watched them win NCAAs by 55 points and wants to win a team title and maximize his own chances of winning an individual title.
Now tell me again why adding NIL in this situation is ruining wrestling?
Here is a hypothetical where one might argue NIL is ruining wrestling:
A University of Florida alum wins $2 billion via Powerball and decides to donate $100,000,000 for the Gators to create a new D1 wrestling program. The new UF wrestling program offers $1,000,000 NIL deals to entice former NCAA champs to join their program. Suddenly their roster gains 10 former NCAA champs who all couldn't say no to $1,000,000.