^That's misunderstanding the meaning of realism. It's not about being exactly like reality; that would be pointless. If you want reality, go out your front door. Realism in fiction is about taking something unreal and making it feel
as though it could be real. The audience may know it isn't something that would happen in the real world, but if you create a sufficient illusion of reality, then they'll willingly suspend disbelief and let themselves imagine it's real for the duration of the experience.
It's like the old saying: "The key is sincerity. If you can fake that, you've got it made."