Answering this from a NRI perspective, but the cost of college and post grad is often so high here that people are burdened in student debt as soon as the leave college (most people I know finished their studies with around $70K+ in debt), the most sensible thing for them was to live with their parent while trying to stabilize their job and finances a bit. Obviously, some people still choose to move out but I’m talking about the experiences I’ve seen.
That being said, it is possible to live with your parents and not obey every word they say. Surely, moving out is a mark of independence, but I think a lot of people I know that live with their parents post-college have a mutual understanding with their parents. I know I do. They don’t keep tabs on where I am, they don’t know of my finances nor do they ask. I’m not made to feel like a “child”. However, I know that once my job is stable and so are my finances, I will move out.
I don’t know if this post makes any sense but I kind of do think it is possible to be “an adult in true sense” while still living with your parents. But then again, that depends more on the parents and how much of an understanding you have with them.