Who was building all these 3-4 bedroom 1.5 bath houses? Why?

I swear every house I click on looks nice, listing says 2 bathroom, and then I'm looking through the pics and it's one tiny bathroom with just a toilet and then one bathroom with a shower and tub. Maybe I'm weird but I think it's strange for a whole family to share one shower when you're paying $700K for a house?

Who's idea was this???

And don't even get me started on the ones where the bedrooms are all on the top floor and the bathrooms are all on the bottom floor...