You can certainly go too far in either direction (talking or not talking), but to the extent talking matters when it does, it's not about "ego", it's about 1) "What did they know that I don't" and 2) Building shared understanding of the context and decisions and architecture.

As the OP says "A healthy engineering team is constantly building trust." Sometimes you already have enough trust and shared understanding to not need a discussion, other times a discussion is good.