That you don’t “wear” the American flag, that it’s disrespectful

But you see right wingers doing it all the time

Some still follow it though, mostly Silent Gen's.

they are an earth bound military force. Like all humans, there is no permanent home in space. Ifthey fight a war in our lifetime, it will be on earth.

Sure, a few may venture into space for short periods, but it will be mostly for show or satellite maintenance. Any offensive strikes would be done via automated craft. Defensively, they would merely be targets.

But 99% of them will be on the ground. It's just the way things are.