Living at home at 30 represents a failure of one thing: career.
The reason most* live at home is money, right? As much as Miles wants to run around in circles about irrelevant shit, it comes down to people living at home because of money. If everyone in this thread living at home made $200k, would they live at home?
*Now there are cultural and personal reasons too, no one denies that. But let's take the most vanilla case that keeps getting thrown around here: need to live at home to save money.
If you need to live at home to save money, you fucked up. Before you ever leave college you should have secured a position to begin upon graduation. This is what internships, career centers, recruiting fairs, open houses, etc. exist for. There should never be a reason to go home because you need to look for a job. That is laughable. That means you did fuck all in college.
If you did secure a position and still need to live at home, that means you picked a career that doesn't make enough money for your area's basic lifestyle. If you live in NYC you know how much you have to make and which careers give you that option. If you chose to be a librarian making $20k, then you living at home is a result of you making poor choices. Not rising rent or the economy lol. If you live in Kansas and chose to be a librarian making $20k, you're absolutely normal because you knew that would be fine to support a life there. If you're working and living at home, you either fucked up your studies or didn't find the job that you need to make your career thrive.
If I meet a 30 year old living at home, the first thing I'd think is sick family member or their culture. Any other reason can only mean one thing: they fucked up. And that's why it's judged, not because I think they're immature or afraid of failure or play games all day. It just means they lost at the easy game of life.
The problem in the UK is wages and actual living costs are massively out of sync.
Average house prices are around 9 % times of local salaries. In London that is high as 25%.
But even in the poorer areas, minimum wage will not allow you to rent alone, there is not a chance of that happening without a massive income of benefits alongside your wage. Flat sharing is possible but then you won't be able to save money. So you are stuck renting and can barely contribute to the security of your own retirement. So the system in the UK is broken in that sense. So you could be a librarian in any part of the country and not be able to afford to live anywhere.
The problem is, that also applies to teachers, nurses, police officers etc. Roles that are vital in our society.
People who have to move back home at not failures. Most people work really hard but even that is not enough. A quarter of 20-34 years old are having to move back home. That suggests to me that is a problem in the system, rather than just a result of individualism.
Although i do agree slightly about your point on degrees, however, here in the uk, i think it is more to do with that degrees are now an extension of our education system rather than a place to specialise in a study. Almost everyone between the age of 18-34 as one.
But your assertion that Art degrees are worthless is missing the mark too, they're not just about painting or taking photos, you learn much more than that, analytical skills, writing, marketing, even economics. And some places value that creative spark that can lift their own company above others, seeing things from a different angle. Where i work the management try to tap into that, by using their employees skills, whether they are art students, or ex paramedics or nurses.
And what if you don't go to uni? Want to be a plumber? Electrician? Builder? Employees use internships and apprenticeships so they can pay less. So even when you leave home at 18, or finish school, you are not really in a position to move out.
I have spent most of my twenties living away from home. Made some mistakes here and there ( growing up eh), had to move back, luckily i have nice parents, but it is wrong to assert that anyone in mine or similar positions are total failures and lost at the easy game of life. Life is not easy.
And frankly, if more people were less interested in having to make 80k by Age X, having said car by Year X with a trophy wife it be a better place. Not everyone is driven by the same things. Some people may want a simpler life, but even attaining that is difficult.