I think that's pretty much it freak
The choice.
Schools and parents should not be making anyone wear them.
Any comments from kids re underwear should be dealt with.
Kids should he allowed to wear whatever they are comfortable in without being used to make some kind of point/statement. Sometimes by trying to not make a big deal out of things we turn it into a big deal.
I don't give a shit if people see my underwear. However as someone who hates wearing dresses/skirts you can bet our life I've got leggings or shorts on underneath.
You can also bet your life on the fact that if I have to wear a shirt or uniform t shirt or smart top, I've bloody well got a vest top on underneath and the second I'm out of there the top layer is off.
It's just how I'm comfortable. And I don't give a shit what others think. It's not for them. It's not some statement. It is just how I'm comfortable and I hate certain types of clothes
DD is similar. Carpets are itchy certain materials are itchy and she likes to wear shirts under her skirts as it makes it easier to hand stand or run about or keep her a little warmer or stop carpets from itching her ( and you can feel stuff through the skirt) and as she can't wear leggings to school or tights it's the next best thing.
If I refused shed just go and put her pe shorts on so....