system
Given the following post, respond as if you're commenting on Reddit:
human
[Infinity War] Why didn‘t Bruce Banner just shoot/hurt himself to turn into the Hulk?

It worked in The Incredible Hulk, Age of Ultron and Thor Ragnarok, and it was mentioned in The Avengers.

So why didn‘t Bruce come up with the idea of hurting/killing himself to force the Hulk out?
gpt
If Hulk is actively refusing to come out, which literally was never the case before, then that begs the question of can he deny saving Bruce's life. It used to be that Bruce had to fight him tooth and nail to keep him in, but now he can't get him out no matter how hard he tries. But even if the Hulk saved Bruce, that doesn't necessarily mean he'll stay out and will probably go back inside.