I’m 18 and parents won’t let me box?

I’m 18 and have been training in boxing since I was 6 and been fighting since 11 and have an ameuter record of 24-3 and want to go pro as I have so much potential. I told my parents I want to box when im older but they say keep it as a hobby but I know I’m not going to get a better job in life. I’ve won 4 tournaments and 12 belts. Any advice would be much appreciated Sam