There is a romanticized vision of the suburbs where you get to know your neighbors and have cookouts and trade favors like borrowing tools or baby sitting services.

Usually all the houses in a 'burb were built at the same time or within a few years so it's less likely that there will be houses nearby that are literally falling to pieces potentially lowering the "sale value".

Its typically assumed that home ownership is a way to build some small measure of wealth over time. So you've got the option of selling the house to help fund your retirement or passing it down as an inheritance to family. And all you have to do is just spend a fuckton of money up front, a shitton of money for the next 30 years, and a small crapload of money to keep the house "looking" like its in decent shape to help it hold its market value.

As was mentioned in another comment, there probably a bit of nostalgia for the post WW2 period where a chunk of returning veterans opted to use their GIBill to get a house instead of going to college, and starting their families. Lots of these people moved near to each other, into those suburbs and all went to work at a local factories or larger businesses and had a similar enough life schedule that they could actually know their neighbors. People at that time probably weren't moving in and out every few years so you could probably do things like have block parties, expect the neighborhood kids to play with each other, invite neighbors over regularly for weekend cookouts, or ask if somebody could watch the kids while the parents went out on a date.

Driving to the grocery store wasn't that big of a deal as one of the parents was doing the domestic work. Shit, driving to several grocery stores to shop for the best prices or clipping coupons and spending the whole ass day driving around to use those coupons was not seen as a waste of time and prices were low enough with wages high enough that it was also still economical to do.