My personal stance towards high-risk startups changed dramatically a few years ago when I took on a big chunk of responsibility for my parents' retirement. My "nest egg" that could be absorbed in a pre-revenue startup has more or less been transformed into the house they've retired into. Having my first kid a couple of years later only compounded the effect. (They're also mutually-dependent, since my parents provide essential childcare while schools and daycare are shut down due to COVID. My parents not having to work right now is literally a matter of life and death given their age and medical histories.)

Regardless, "smart, sustainable work that will support my family" doesn't really map to the intentionally-accelerated make-or-break pace of most incubators and funds. Nor do those programs naturally align with founders who want to create a solid long-term business working from sound operating fundamentals (positive cashflow, measured and even conservative hiring, working to the team's strengths) instead of chasing the next exploding market and "faking it until you make it".

Coincidentally those safer, longer-term plays are also the ones most likely to actually build generational wealth and financial independence for people starting without either. The lack of a safety net (or the presence of one that you're thoroughly entangled in for others' sake) makes all-or-nothing, giant bets far less tenable when you aren't effectively free from having to worry about mundane details like housing or medical costs. That in turn discourages if not de facto shuts out both the least privileged and those with meaningful resources but too much to lose if it all goes wrong.

That assumption holds for most of the population in European countries, even the poorest ones. In fact it's common for young people to live with their parents a long time.

One has to be either dirt poor or very unlucky not to he able to move back with relatives. This sound like an excuse.

The median wealth of African American households in the U.S. is $35k, vs. $150k for white households.

Yes - most people might be able to move back in with relatives, but among those people who can't, minorities are almost certainly going to be overrepresented, which was OP's point.

The world's quite bigger than the US and its particularities don't apply in most other countries.

Sleep in the couch or basement, food costs very little. That's still a lot of support, means that no matter what you have a place to stay and regroup. Not all parents can do that but most could