Both are potentially mildly damaging, and they take roughly similar amounts of time to reverse.
That being said, I find hair requirements distasteful as well.
in any case, this was more of a "people who live in glass houses" post than a defense of the rule. imo we have a lot of arbitrary appearance requirements for school children that do more to distract from learning than anything else. the school I went to justified their strict dress code by claiming it was all to prepare us for our professional lives. I have to chuckle at that one when I show up to the office with hair that goes down to my bellybutton, a beard, and a tshirt, still looking more "presentable" than many of my peers.
I think the reason why we see these things still happen is because the laws are broad, continually improving, and education is administrated at a local level so you have different organizations rediscovering the same social issues over and over.
The authorities response between the black live matter protests and the terrorism from trump supporters is just one recent example of this. As long as the people discriminating have more power than the ones being discriminated, laws only protect some.
I never forgot this story from 2018 about a black police officer suing over a requirement to be clean-shaven every day.
> Officers have to be clean cut, except for mustaches or short sideburns. Joseph Lewis, a six-year vet of the force, however, suffered from razor bumps, which made it painful to shave. The condition is common in about 60 percent of African-American men or people with coarse, curly hair, according to the American Osteopathic College of Dermatology.
https://newsone.com/3780050/racial-discrimination-shaving-fa...
It seems the USAF is now issuing these waivers with 5 year terms. [0].
[0]: https://www.airforcetimes.com/news/your-air-force/2020/06/24...
a) a racial subtext, through maybe unintended
b) damages your hair, potentially permanent
c) tells you you are less good because you don't have natural black hair
People who have chemotherapy and lose all their hair often find that their hair grows back differently (texture, elasticity) than it was before. Hair dye isn’t going to do that, but chemicals absolutely can alter your scalp and the follicle permanently.
Having said that, over the counter stuff absolutely affects the the health of your hair and dying too frequently, leaving dye on too long, using a poor quality of dye (of which over the counter almost always is), too much peroxide (which is often needed so the color can stick) can absolutely damage the hair on your head permanently (until that hair is cut off and regrows). The only way to truly recover from the damage due to hair dye is to cut it all off and regrow, which for people with long hair, can take a tremendous amount of time.
https://www.consumerreports.org/lead/removing-lead-acetate-f...
This is why you should, if possible not dye your hair up to the roots. But the more the difference between dye color and natural color the more this is noticable. Furthermore even if your don't dye up to the roots it's still possible for damage to affect them.
It was a (catholic) religious school so there were religious exemptions but they also talked with the parents a ton so no one could pull that.
https://soranews24.com/2016/10/27/tokyo-junior-high-school-d...
It’s a bit like Zwarte Piet in The Netherlands, where from an outsiders perspective it looks clearly problematic, but if you have grown up in The Netherlands you likely don’t see anything wrong.