There are going to be things in your life that your parents are not going to agree with, that is very common.

The best thing to do is to take your parents' opinions and reasons into consideration, appreciate their input and then do what you need to do for yourself.

If you are a minor, then you need to listen to your parents when it comes to most things. But if you're an adult, then all that is happening is that your parents disagree with you, but oh well.

If your parents take a disagreement far enough as to disown you or some other extreme reaction, then that is on them.