I read what he was saying differently. When errors like this occur it's very much worth evaluating what could be done to avoid it in the future beside me just learning my lesson. There are many general team behaviors (e.g. Automated functional testing, automated load testing, static analysis, code reviews, non-production environments, etc.) and things specific for the problem at hand (what test is missing that would have caught this?) that must be considered after a major issue. If these aren't evaluated then there it is likely they will happen again. I don't believe these are being treated like a child. Instead these are the team deciding to be adults by avoiding emergencies and being more confident when releasing.