I'm really confused about something

Km

I don't mean to be offensive at all, but can someone explain something to me?

I don't understand how seeing head hair can be immodest? We have hair all over our bodies?

Why is that hair different than eyebrows or arm hair?

I have no problem with people covering their hair, I just don't understand why it's considered modest.

Maybe preggo brain isn't letting me think. I just don't understand.

I hope I wasn't offensive, I truely apologize if I was!