There is nothing lore specific about underwear and the fact anyone has even tried to imply that is absolutely and utterly ridiculous.
It is one thing to say you don't want it, or even say you don't want it because screw miqo'te, but to create a fake, flimsy argument is another thing entirely.
I will never understand people who seriously oppose more freedom towards wearing different armor/clothing. It'd be like saying that Summoner should never get any additional egis, that there should never be extra housing wards, or that you should never be able to dye AF gear. It'd be like justifying or encouraging that mogstation gear remain character-locked and not account-wide. It'd be like opposing the male bunny outfit just for the sake of keeping it unique solely to women. It just makes no sense to me at all. Limiting options just to limit them would make sense if people took that stance with everything, but taking it with specific things to push their agenda is a bit disgusting. I've seen people in previous threads and in this thread oppose or support the previous things I've stated multiple times, yet every time disagree with this. The same people whining about how summoners should have additional egis/egi glamours and then simultaneously saying that hempen gear should remain locked just because? It makes no sense to me. Even less when the same people who constantly whine and complain about the male bunny outfit not existing try to seriously justify wanting to lock the hempen sets. Especially when depending on who you ask, they have no business wearing anything of the sort. I'm fine with it, personally, but yeah.
As for my particular stake on hempen gear, I don't really care. I think the Midlander female top is cute, but I've been a Midlander before and may do it again. I'm mostly posting my two cents because I just dislike seeing posts that say, "limit options for generally no good reason except my personal preference and nothing more." The game is made to cater to the experience of a community, not an individual. There will be things you dislike that the majority will like, get over it.