What if your kid never becomes an adult for reasons out of your control? (ie. because they are lazy, unmotivated, prefer to be a freeloader, or have a childish mindset...and developed these traits despite your best attempts to dissuade them?) Then you should feel obligated to take care of them until they maybe one day decide to grow up, just because you are their parent? Or is it ok for you one day to get fed up with it?

Yes, personal responsibility isn't a one-way street. It kind of seems like you think it is though? That a parent is responsible for literally everything in their kid's life, and gets all the blame for any problems their kids might have, even into adulthood. Even though there are many other factors, such as peers, school, etc. influencing a child's development, many out of a parent's scope of control.

Note that this is kind of a non sequitur...I'm definitely not talking about the OP here. I'm also not really talking about people who were abused, or "never taught to care for themselves" (although given that the average child has MANY influences outside of parents, ie. school, friends, society, there would have to be failures on multiple fronts for a child to become an adult who has NO idea how to function in the world, hold down a job, etc.) I'm more talking about your typical "20-something who lives in their parents' basement and then bitches when they are annoyed by their parents making them follow a set of rules, or not letting them do whatever they want."

I came to this subreddit to try to figure out some things w/r/t certain people in my life, but some of the attitudes on here are pretty alarming. It really seems that many people on here think "children" (or adults with the mindset of children) are infallible and parents are, well, the exact opposite.