

Capping the luxury features and size of passenger vehicles would do a lot more to bring down costs than removing safety features.
The average cost isn’t the problem; the base cost is.
There are good arguments for limiting vehicle size and weight for safety reasons, but that’s a separate issue.

Who wants to dress fancy when they have to go through a TSA screening?
It does seem like some people forgot how to regulate their emotions during the COVID lockdowns though. The airline employee in front of you probably didn’t cause your problem. Screaming at them won’t solve your problem.