And it's also filled with fog during most of the fight, and I didn't mean minor as in size or events, I meant minor as in frequency of visitation, as I quite clearly said.
Quarantine Cave is a huge setpiece... it makes no sense to claim it's minor or unimportant just because you don't have to revisit it very many times. By that logic Artifact Temple isn't very important either because you only have to visit it once per game. I really doubt that was Retro's thought process.