Your argument seems a bit silly to me. Yes, if we want to make an extremely broad range like that, then we could consider incomes from 30K to 200K "average."

I'm talking about people who conflate median and average and truly think 100K+ is median income for a typical family. 150K is nowhere near the national median income for a family of 4.

In a certain environment, you can get into this mindset of "Well, we make 125K and we can barely make the payments on the house and the cars and the this and the that, so we're obviously middle-class. We're just getting by." There is little awareness of other realities.