I read that as being his emotional reaction, not something he'd say in an interview context. This being an internet forum and all.
What I think he's sincere about is not wanting to work at a place that builds unnecessary stuff. And if people are asking for answers that require building unnecessary stuff, I think it's a reasonable inference that the place is not right for him.
I think interviewing is always a two-way street. If I got the feel that a place was going to have a lot of over-complicated code for me to deal with, or expected a lot of status-driven deference against actual user and business need, I wouldn't just give an interview-ending tart reply. But I would politely finish out the interview and then write them off unless there were other signals that redeemed the bad interview questions.
What I think he's sincere about is not wanting to work at a place that builds unnecessary stuff. And if people are asking for answers that require building unnecessary stuff, I think it's a reasonable inference that the place is not right for him.
I think interviewing is always a two-way street. If I got the feel that a place was going to have a lot of over-complicated code for me to deal with, or expected a lot of status-driven deference against actual user and business need, I wouldn't just give an interview-ending tart reply. But I would politely finish out the interview and then write them off unless there were other signals that redeemed the bad interview questions.