I know some other games do this. Valorant and League of Legends are both successful, and both require heroes (agents and champions, respectively) to be unlocked from the off. But crucially the original Overwatch did not, and that was a major part of the appeal. This unlocking system was at one time commonplace in the fighting genre, until studios realised this was no fun and served no purpose. Overwatch 2 DLC 2 seems to be deliberately making the game less fun in the hopes of ensnaring players to keep playing until their favourite hero is let out of jail.