It's difficult to pin down exact numbers.

according to Northwestern Mutual’s 2018 Planning & Progress Study, which also reports that “fewer people said they carry ‘no debt’ this year compared to 2017 (23 percent vs. 27 percent).”

( https://www.cnbc.com/2018/08/20/how-much-debt-americans-have-at-every-age.html )

A website called shift processing seems to agree with these numbers, saying:

8 in 10 Americans have some form of consumer debt, and the average debt in America is $38,000 not including mortgage debt

https://shiftprocessing.com/american-debt/

So you definitely have a point that most people have debts