Your comment explicitly mentions averages. It's a matter of basic fact that the average working-age male in 1963 was not supporting 5 other people with his salary.

They are not census statistics they are an amateur assembling statistics using public census data. The methods are not published

The method is listed in the description below the statistics. Again: if you think these numbers are suspect, you are encouraged to find a different citation that contradicts them. Without that, your complaints are unsubstantiated.

don't base your understanding of history on a casual web statistic.

Averages are lossy to begin with.

My whole point is using multiple indicators to build an understanding.

You can keep repeating yourself but you only come off as naive.

No, but the “typical” person isn’t old. Just like the “typical” man didn’t support 6 people in the 1960s.

Take a break from the internet, and read books and interviews from that era. Your "average household of 3.7 people" is not representative.

These are the US Census Bureau's numbers. If you're going to contradict the US Census Bureau, then you're going to need to provide some actual sources here. Without that, this is low-effort trolling.