It’s the same mandate for flights, buses & trains. Not sure why the FA’s have made it a holy mission over the others.
You should be upset with others not enforcing the rules. Not the other way around.
This is where Mr Goalposts comes into play.
@aygart Does not matter if I like the rules or not, they should be enforced.
Like when SCOTUS ruled against the OSHA vaccine mandate. I didn't like it but you need to follow the rule.