These are indeed the main problems with working in IT. It’s so oddball how everyone expects you know everything about anything that runs on electricity of any kind. I will never understand that. I don’t even assume a tax attorney knows anything about contract law. However, the hoi polloi believes that because I know how Linux works, I can troubleshoot an issue involving some obscure code they wrote in 1998 or fix a coffee machine.
It is completely mystifying.