I agree with you but not everyone has the same thought process as us. I’ve explained it to my entire family and I always end up “fixing it”. My family doesn’t care about alternatives because they dont like things to change. “Why learn something new when the old way still works?” My family’s thought process on these things just doesn’t make sense to me sometimes but it’s the conclusion they get to.
You should look up how much nitrogen there is naturally in normal air.