People were doing complex surgeries, making fighter jets, submarines and spaceships without what you seem to call a computer.

Also I can't return to being an American because I've never been one.

And C64 is a computer, Radio-86RK is a computer, Amiga 500 is a very good computer.

Supersonic passenger planes have been built, before personal computers becoming anything common, but aren't operated today.

And you most likely don't live in a more than 60 story building, despite such being built.

And deliberately reducing your comfort is sometimes valuable, not everything should be entertainment.