One who needs a good, steady paycheck at a stable company? Just because hiring team doesn't have time to learn/apply a specific piece tech on the job doesn't mean they're low performers or less competent than the interviewee. They can be sufficiently busy with their current jobs and need someone experienced to lay the groundwork for others to run with. People that go and implement stuff when they're already busy usually half arse it. Those people are just creating issues that'll be fully realized months, years later.

If you say you know tech X, manager wants to hire for tech X to solve a business need, and I'm asked to help interview, I may ask you questions about things I don't know or do myself because it's my professional responsibility to my employer and manager to help them hire a quality candidate. Maybe some people use the interview as a place to be jerks or show off but that's not always true. Personally I'd rather not be involved in the process at all.