Engineers are not exactly famous for people-pleasing. Maybe management, but engineering? Maybe some fresh junior?

I'm not convinced that the existence of a low-probability event justifies normalizing the regular occurrence of a much more likely (and negative) event, like a belligerent engineer throwing a fit in a design meeting. I'd go as far as to say I'm open to more people-pleasers in engineering.

Also, fwiw, if you want to know why someone changed their mind, you can just ask them and see how you feel about the answer. If someone changes their mind at the drop of a hat, my guess is that their original position was not a strongly held one.