If you don't like it, don't press that button
As I'm getting older, I'm definitely starting to appreciate that I just can't see shit. If the game's going for an ultra-realistic environment, then there's just so much more visual clutter that I need help picking things out.
In my opinion, it's just an accessibility feature. Those are always nicer to have than to not. But if you're a purist, or you don't have any problem finding things, then I'd also hope you'd be able to disable it.