I can appreciate your opinion, but there’s nothing that can’t wait until tomorrow unless it’s life critical. Is it going to only take 15? Or will will it take 30-45 minutes and now I’ve missed dinner with my family for your question that is not critical.

If I don’t defend my time, who else will? I don’t buy the argument about rigidness being a bad thing. That’s how boundaries work best: clearly defined and enforced.