An architect (housing) must deal, daily, with the whys of his work, not only technically but also metaphysically. If an idea/concept is not rock solid, veto players will smash it in seconds. Once they are used to have their work criticized[1] it takes a lot to butthurt them.

[1] Top architectural offices do mostly competition work. It's not uncommon that one architectural competition has hundreds of participants and only one winner.