I guess.
All I know is that - living in San Antonio as I do - I see soldiers and airmen every day in various uniforms.
I’m proud to see them, and I’m sure they take great pride in doing their jobs as they proudly wear their unifirms.
I can’t imagine a Marine would show disrespect for himself or the Corps by being “out of uniform”.
Am I to guess that Marines have problems the other armed forces don’t?
Years ago the Fayetteville Police were taking advantage of GIs down on the 500 Block of Hay Street.
The XVIII Corps Commander asked the local government to be a little nicer. They didn’t. One night he and his aid went down for a look-see and got hassled by the cops. Monday morning he put all of the city and county businesses off limits to soldiers. They could only shop on post - even the ones that lived off post - and he put all the MPs into enforcement.
While hard to enforce the city got slapped and was crying within a few days. The policy was rescinded within a week and the cops were a lot nicer. On Friday & Saturday nights a Cop and an MP would walk together on the 500 Block.
Ah, the good ol’ days.
Marines have always been able to wear their uniform off base, except for utilities (cammies), overalls, and flight suits, which are regarded as work clothes.
That is the reasoning that USMC fixed wing aviators wear different colored t shirts; it’s not a uniform.