This. On paper I'm "wealthy," mostly because of how my home has appreciated. That's very, very different than someone who has 1m in the bank as cash or sitting in investments. Selling the house isn't an option, as this is where we live, raise our kids, etc.
Most middle-class retirees are millionaires now, considering inflation and property values, not to mention how much someone with even a modest salary can squirrel away over 40 years in savings and retirement funds. The metric the parent poster used is very misleading. Personally, I don't consider someone a proper millionaire unless that value is separated from the "need to live" stuff like a house or car or retirement fund.
I think getting rich like this is pretty darn rare. I don't belittle the "gambler's approach" or the crazy business idea approach. I've seen others win before with things I considered stupid or super risky. Life is funny that way. The guys who "made it" all remind me of Michael. They just didn't screw up step 2 - go low risk after the first big win.