I don't know if this will answer your question, but I'm trying.
When I show a house with 4+ bedrooms, it is always to a large family. Ok, with me so far?
And if that house has fewer than 2 full baths, they would turn on their heels and walk out! Guaranteed!!
Does that help?
It seems that there were a LOT of homes built during the boom years 1950 - 1975 that had either 1 or 1 1/2 baths. And I am amazed at how many of them cannot be modified (easily or cheaply) to have 2 full baths.
I cannot imagine a big family now-a-days living with that. When I was a kid; sure, all the time!
Good luck and may God bless