WHY should I cut my hair?

I'm a 59 year old woman. I have hair that has no gray and is a little past my shoulders. Been trying to get it to grow for years, but it just doesn't. So several people recently asked me when I was going to cut my hair, because I am a women over 40. Who the hell makes these rules for women? I have my nose pierced, 25 tattoos, and I dress very trendy and act like I'm 25. Why do people expect us to get a certain age and start wearing polyester clothes, cut our hair, start hitting the seniors hangouts to play bingo? I don't get it. Do similar rules apply to middle aged men? Are there unwritten rules that they are expected to follow when they hit 40?
So I am interested in hearing from people to get your take on whether they believe women should cut their hair and dress a certain way after 40 ? I personally think it's stupid to expect that of us, but that's just my opinion.