Unfortunately he's somewhat right. Not because the interviewers necessarily know wtf they're talking - they probably don't. But going against the current hype in an interview can only hurt your chances. Liking something like GraphQL, or React, or Framework Of The Month can't really hurt you even if your interviewer doesn't like it. But not liking it can be a real issue! I would suggest at least staying neutral on the current hype stacks in an interview. It's like debating religion - don't go there...