HAIR ..NO NOT THE STAGE PLAY

Please help me out with something. It's my daughters. Why does it bother them if I dye my hair? Please tell me why they should care. I am growing it out..I hate it..but I am doing it because they kept saying things about it. I just cannot, for the life of me see why it should matter to them. They actually want me to look old.
My second from the youngest said "I want my daughter to know how to accept aging and how to go gracefully into old age." Ok. So..so..what does that mean? I don't dress young. Yes I live in jeans but..sorry...that cannot change. Someone just tell me what the big deal is about what color my hair is. I never said one thing when they started dying theirs. The one I just mentioned says she has stopped.
Anyway..who gives a rats backside. :) Just wondering, that's all.
I'm short, fat and old AND gray. I hope they are happy! lol They really are precious. You should know them.