From where I live, people lives with their parents even after they married, even after having children and grandchildren, and are not accused of being a dependent. It's mostly the other way around -- parents lives with their child, not their (grown up) child living with parents.
Usually, it's the eldest because they inherit the house.
Both for economical and cultural reasons... Mostly the latter.
It's impossible to have your own place before the age of 30 (it doesn't matter if you start working at 16, or well, at 6) unless you're rich or lucky. Or prefer to be stuck at renting for most of your life (which IS my family's case), or become a squatter.
But sure, I DO want a life of my own... But being on my own is almost impossible, not because of ASD. This culture does not truly allow 'solitary', no matter how capable I could become. And why I like keeping my secrets. 