Hehe... "My house my rules" makes far more sense once you become autonomous, start owning shit, pay your own bills, et cetera!!!
And all those people who say "you will understand when you have children" are probably quite right...
Much of the exaggerated perception of the "extreme" nature of skydiving has been driven by sensationalism in movies or on the news... Taking rare examples and making them out to be far more common or worse than they really are. That said, the sport is not risk-free, no matter how much people try to convince themselves otherwise... So every incident "proves" that it is dangerous... And it IS dangerous... And you absolutely can get injured badly and even die.
So it's quite a leap for even the most intelligent person to understand that yes it is dangerous, but it's also "not as bad as they think"
Add to that the fact you have been injured... Well, your mom who cares about you is perfectly rational in feeling concern that you want to get back into the sport... The sky is not going anywhere. Nothing wrong with holding off a bit as well... I've also waited a bit on some things because my loved ones did not approve. If my family didn't deserve that kind of consideration I might have acted differently as well. Only you know that.
I've plowed ahead in some cases despite EVERYONE telling me I was wrong. For some things I am glad I didn't listen... For others I wish I had!! Hahaha!