Why is it exhibitionist for a woman to wear what she wants in her own home? Shes not naked. If she was walking on a beach in her bikini that would be fine but in her own home it's not acceptable.
Ha, good point @Ginnymweasley.
I can only guess - conformity & ownership.
Social conditioning tells us that women's bodies are to be ogled at, that they are public property, that it's ok to comment & speculate on them (looking at you, Daily Fail etc).
Also that at the beach, a bikini is the expected uniform. So that's ok - society accepts it - after all, society can see it, comment, speculate, own ... because the bikini'd body is there in front of it.
However, put on approx. 6 times a bikini volume of clothing coverage IN YOUR OWN HOME, & you must be accused of 'flaunting it'. Because ... how very DARE you take ownership of your own bod. You're not on a beach! We can't see you! We can't comment, speculate, own!
The number of posters telling OP she OUGHT to be wearing PJ's/crops/shorts/whatever proves the concept. They wouldn't tell her off for wearing a bikini (miniscule or not) on a public beach.
But they feel entitled to tick her off soundly for wearing boxers in HER OWN HOME - to the point of using the taxi office as a red herring to support the narrative that a woman MUST comply to a socially-constructed dress code at all times, & that her body & her clothing choices belong to the tickers-off, not the woman herself.
Seeking to 'correct' women for their own clothing choices is patronising, controlling, Gilead-esque bullshit, & when women start doing it to each other, theu're propping up a patriarchal narrative telling us that compliance is a required component of femininity.
Blimey. Time to clear off-screen for a bit before I blow up the internet with my own pomposity, but FFS - get real, sisters.