If we're stereotyping, I think you're overestimating human rationality and the power of emotional thinking, which is also a pretty common trait among engineers.
I’m not stereotyping though; I said if engineers are cynical their is probably a reason. I didn’t say all engineers are cynical or all mangers give them a reason to be.
It sounds like you have a disconnect with your ICs if you don’t understand why they don’t trust you.