While Michael B. Jordan has been acting since he was a kid, he’s hardly had to pretend to die in everything he’s appeared in.
It’s entirely possible for a character’s win to result in their death, but, either way, it sounds like Jordan felt that Fahrenheit 451 was the right next move for him, and his mom, after what Killmonger went through in Black Panther.
Having said that, though, we also need to make a distinction between Jordan’s mom being able to watch him play a part where his character achieves his goal and wins by the end, and his character living through the final credits.
Though, I will admit, that most parents would probably have a hard time watching their child die, even if it were only a few times and they knew that their kid were still alright in real life.