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I'm not sure how common it is (in tech) to be interviewed by the person you work under. If it were common, I would agree with you.

Every tech interview I have had has, at some point, included interviewing with the person I'd be working under

One of the interviewers in my loop at $BigTech was my future manager. He was hiring for his team.

But even that’s irrelevant because of turnover and reorgs, you’re not likely to be under your current manager for long.