1000sq ft per person,? holy sh* Why so much? How much stuff does a human need?

Our current house is 103m2-1108sq ft and with the 2 of us its already pretty spacious. 3bedrooms, a loft, 1,5 bathroom. A decent size garden and a double garage. Other houses in the street have 2adults and 2 or even 3 kids.

I would have no idea what to do with a house dubble as big our current one. The cleaning, the heating bill,the maintenance etc.