As a former UNIX administrator (now cloud/devops/SRE/whatever), I can attest that when seasoned professionals are tasked to maintain systems that often run critical code (for finance, government, healthcare, etc) where we are often at the mercy of other groups (accountants, management, etc) treating us like a "cost centre" where proper investment can be hard will result in a very jaded and cynical outlook.

This is as much a defence mechanism as it is a calling card.