I hear you Damaris and find it unfortunate that your parents frown upon you cutting your hair or allowing you, an adult, to express your free will, however, there's a big difference between cutting your hair and wearing weave to the extent that it causes major health issues or is so addictive that it becomes your normal and you couldn't possibly consider being seen without it. Weaves have become pathological for Black women who are unable to separate themselves from someone else's hair--100% human or synthetic. This is more than just about a fashion statement. This is another prime example of the effects of white supremacy, which is how self-hate is destructive. It is how Black women view themselves with a false sense of reality. And someone else mentioned, can't recall who, but what happens when you're with your significant other and it's time to remove the weave and show your natural self? Or what happens when your babies hair is very different than your weave? What happens when you're raising your children who are accustomed to seeing you in weave 24/7 and don't think you're as beautiful when they see you without it because that's the message you're sending to them about how you feel about yourself?
I really hope that there will come a time when you become your own person and feel confident to do what you choose, regardless of what your parents want you to do. After all, that's a part of growing up, maturing. But, please understand, the fact that we are seeing more Black women wearing weaves and wigs now than ever before, and not their natural hair, is problematic, in my opinion. The fact that the "beauty" industry is convincing these women to part with and exorbitant amount of money to get these weaves and selling them as "protective" styles is crazy.
Peace.