He achieved all those things before his illness though.
He had financial independence, status, and a career before he became paralysed.
This means he could pay for his own nursing, and that's exactly why people see him as an adult.
Here's the thing: what people are calling "adult" is nothing other than the traditional definition of "man"
A "man" is a person who is independent, powerful, free, makes his own decisions, pays his own way, has others depend on him, etc.
What's interesting is that you have clearly indicated that, despite being female, you feel like a man! Meanwhile there are many males who do not.
I think it's a very interesting discussion. Too bad my bringing up the housewife/paraplegic angle got me 18 downvotes and counting.