>>212937763
The helmet thing plays into another problem of Prometheus that's annoying: they believe they are flying to Heaven to meet actual God and Angels. Since they are doing that, then God would have breathable, microbe-free air, of course. Then finding out it's just boring ancient aliens that are also mortal makes them suicidally depressed. It's really dumb because at no point did anyone promise them they'd meet God on that planet and there was no reason to get expectations up that crazy high.