Got to admit I've never seen this attitude on the flights I've flown. Admittedly mostly with my own mob(s). Sure, have run into the king of the cabin once or twice but Captain rules. Next are First and Second officers to avoid annoying anyone.
Cabin staff get the emergency training - get to use it very, very rarely. Know the safety speil backwards. Most of the work is feeding and thinking about how to spend the lay-over. Most are not familiar with the concept of conducting a complex event in a dangerous environment, or even how machines can fly. Most, I say, for there are some top notch FAs.