Sure, you can be happy that they donated money to a cause. But billionaires are the reason donations and philanthropy are necessary in the first place. You don’t become a billionaire unless you’re doing unethical shit and/or exploiting a lot of people (there’s inheritance, but that’s another problematic topic altogether).
Once puberty hits there are some irreversible changes to the body. That’s why it’s good to know early. Besides, there’s a long and arduous process with professional evaluation and what not before anything is actually done.