For a single, childless person who wants to live a lower-middle class lifestyle in a low cost of living area, sure.

But if you want to live in a decent location, you're looking at needing at least a million just for a house. That leaves 1.5 to generate income, so at a 3% safe withdrawal rate that's $45k per year. After taxes that's now like $35k. And you're not getting health insurance from employer so budget $6k per year for premiums (and be ready to pay out up to $6k per year more if you end up in the hospital).

So in the end, you've got something like $20k-$29k per year to live on. That covers groceries, car maintenance/insurance/payments, upkeep on the house, phone, etc sufficiently for one person. But you're probably not joining your friends on their ski vacation or even going out for drinks with them too often.

And of course, the whole thing falls apart with a family. The average cost of health insurance for a family of 4 is $24,000 per year.

FYI when I took some time off, I had to pay ~$3500/month for health insurance for a family of three (and of course still pay deductibles and out of pocket costs).

Health care insurance in the US is unimaginably expensive.