The key thing to understand is the difference in how precarious those situations are: that affluent suburbanite has some shiny things but their cash flow is much higher than their wealth. A TV in every room is a rounding error on the $11k/year each of those new cars costs on average, and over the course of someone’s working life that kind of thing makes a huge difference in net worth.
The American healthcare system factors into this significantly: if your income depends on showing up to work daily, all of that can go away with a single health incident which leaves you unable to work. A truly rich person is considerably more likely to be able to ride something like that out.
Similarly, retirement is a source of stress for many Americans. Having given mortgage processors and car companies millions of dollars over your life won’t help you much then.