There is a blank, but even with that blank in place, I still wouldn't describe his situation as "unbelievable" or "unrealistic". Not when there are real-world examples that can account for his situation.
I'd say the biggest difference between Jujutsu Kaisen and this is that the monsters in this are public knowledge. Which is a single difference that would have an ENORMOUS impact on the setting.
There's a huge difference between a secret organization hunting secret monsters. And everyone knowing there's monsters and people know about the department that hunts them.
JK is Men In Black. CM is Ghostbusters.