Everyone's bike is at risk of some kind of failure, it's called riding a bike. You just didn't want to help and while you might be comfortable with never learning how your bike works beyond understanding which end faces forwards, there's no reason to discourage other people from bettering themselves.

And your whole melodramatic "I was rude to him because I want him to be safe!" Crap was ridiculous, give me a break. There's no reason why your belief in not learning about your own bike should translate into rudeness, so give it up