By the time my cousin got married, he was in his 30s and had lived at home all his life. He bought a condo immediately with his savings for him and his wife to move into.
My best friend lived at home until he paid off his student loans after which he saved enough for a down payment for a condo.
My other friend lived at home till her 30s, when she got married and moved in with her husband.
My other best friend is living at an apartment with his parents, and has a steady girlfriend as well as thriving businesses.
For some people I don't doubt living at home with your parents would be awful for development, but there's so many ways to live life that I would never generalize the outcomes without fully considering the circumstances.
Anyone in his 30s and living with his parents is going to have constrained social opportunities unless he's some kind of royalty.
If you earn money, then you're independent enough. That's enough for me. It's a bit embarrassing to admit that you live with your parents, but ultimately so what?
Assuming you mean living with your parents in their house, it pretty much is. It's different if you have an elderly parent living with you in your house.
Anyone in his 30s and living with his parents is going to have constrained social opportunities unless he's some kind of royalty.