I find your response baffling. I think it was completely out-of-pocket but I’m going to extend a one-time olive branch in good faith that there was some sort of misunderstanding.

I am open to a proper explanation as to how specifically it was hurtful or disrespectful. And if it was and I’m missing a social cue here, I would love to know how that equates to such an aggressive response. My absolute best guess is, that you read it as “you can’t be good at anything”, but I said “you can’t be good at everything”, which literally implies that you are good at other things.

I actually was a certified HVAC tech for a few years. I have seen people get seriously hurt not knowing when their system had steam in it or from not being able to control when the boiler kicks on (mostly renters) and steam starts shooting out of the hole mid-repair. I don’t have any way to assess your skills over the internet so I suggested the safe option. Similar logic to, if you don’t know if someone can work on cars, maybe don’t tell them to do their own brakes.