Under the WHO, Arnold Schwarzenegger was considered obese while he was in his prime.
Yeah every internet basement nerd is one of the 5% for whom BMI doesn't work, not the 95% it does. Mysteriously you have the body of a roided out genetic freak who spends 8 hours a day in the gym.
And there's a reason you guys don't change it
Mostly we have. The weights and measures act came in in my lifetime. I've seen stuff go from mostly imperial to mostly metric.
However, unlike Europe, it has no authority at all to ban its use.
Good grief, it's not banned here. You're allowed to use it, but you cannot use it exclusively for trade units. You can even use it in business. Machinemart still stubbornly insists on selling compressors using HP for the motor and CFMs for the airflow exclusively. Not illegal, just annoying because literally the only thing useful you can do with HP is convert to Watts, and almost none of my vendors of air parts bother quoting CFM because it's so rarely used.
But it's not banned.
Given this was the case when we were in the common market and customs union, I know it's not banned in the EU either. i.e. don't just make shit up because you feel like it.
If you want to go this route:
Nice deflection. More advanced tech exists than Apollo, some of it is outside America and beyond what America can do and is made with metric units. IOW, your "Apollo therefore imperial fuck yeah" argument is invalid.
Airliners aren't really advanced in anything.
You don't understand the difference between avionics and aeronautics, huh. Also, hell yes they are.