The figure might be misleading. It might not be.
Either way, the idea that the natural and normal state of affairs is that every person can go out into the world and be a perfectly self sufficient but comfortable atomized economic unit without support from their family or society is deeply flawed.
This wasn't the norm for most of human history, and it isn't the norm globally today.
Look at the comment above, the sample is from really wealthy parents, not the median income in the US, so I'm sure that skews the data.
Slavery and massive wealth disparity was also the norm for most of human history, but just like generational wealth transfer, that doesn't mean it's equitable (or sustainable). Personally, I'm concerned that this will lead to greater wealth transfer from poor to rich and the subsequent dissolution of social norms that hold countries and cultures together. But I don't really care, I have nothing to lose here.
It is something to aim for though. The kid feels good about themselves and the parents can enjoy their hard earned money to have a banging retirement. My parents won’t stop traveling. They’ve been to something like 50 countries over the last 5-7 years.
It might, however, be a nice thing to aspire to, no? Economic self-sufficiency doesn't have to imply atomization, I think.