stilton
Very good post indeed. In my brief I do the same myself, where I encourage input no matter how trivial.
If a person as Captain comes across as agresive, snappy or very arrogant for example, he/she has immediately built a wall, which could stop communication no matter how trivial especially from a not so assertive F/O. Below is a case in point.
Decades ago when a certain airline landed at a new airport. So new in fact it was not yet open, except for their a/c opening it temporally. To cut a long story short, the Captain had been "riding" the f/o, who was leaving the company very soon anyway, lined up for the approach at the wrong airport. That F/O knew they were about to land at the wrong airport but, due to the captain's nature, kept his mouth shut and let him get on with it. The Captain had built a wall between him and the F/O for input. Yes the F/O was at fault to of course but was in a position to avoid very red faces.
Human nature? If you bully people, they will react, one way or the other.