Two parents are against it

I'm turning 30 the day after tomorrow... haha. My mom and dad are so against double arms.
 When I was young (early 20s), my main repertoire was not giving money for plastic surgery, cutting off my pocket money, and kicking me out of the house, but
 now that I'm financially independent, there's no justification for that,
 so anyway. He got emotional saying, “I won’t see it if I have surgery,” “Where can I put the knife where I want,” “I’m disappointed in you,” etc. For
 your information, there doesn’t seem to be a clear reason for opposing it. I’m conservative in nature, so I guess I just don’t like the idea of ​​plastic surgery.
 Because of my work schedule, I made a reservation for it early this year. I'm done with it, and I don't know if I'll have time again if not this time... I'm going to give my final notice at the end of this week and do it, but I'm not in a good mood...