“Someone who is not in the military is prohibitted to wear a military uniform. Simalarly someone not in yeshiva is prohibited to wear the Yesivah uniform.”
That is without doubt, without nny single doubt, the most ridiculous thing anyone ever said here.
So you’re saying the tens of working chareidim I know around Yerushalayim, Bnei Brak, Kiryat Sefer, Beit Shemesh and Gateshead, should all stop wearing white shirts and start wearing colored shirts, and stop wearing hats and put on baseball caps instead, because they are not in yeshiva?
Could you give me a single source of a single rav who supports such an idea?