Actually, humans will probably live just fine without gravity - only they will not be able to function in gravity fields.
That's unproven, especially when it comes to reproduction, childhood development, and old age. Besides, humans living in space will need to endure acceleration, such as when rockets are firing. Being in good health, by terrestrial standards, might well end up being essential.
And, as you mentioned, we can already do artificial gravity via centrifugal force.
"Artificial gravity" for such purposes is pretty much a non-problem.
In engineering, there's no such thing as a non-problem.