That depends whether the other occupants knew about the safety features and record of elevators. If they did, then they were making a sound judgement. If they didn't, then they were being completely reckless.
I guess it's possible the parent poster took a poll before leaving the elevator, but I have to say I find it unlikely.
They're saying they think it was unreasonable to stay, you say it was reasonable to leave. Both are judgements about the decisions of others.
I don't think all judgements about the decisions of others are equivalent. Do you?