Well as I've said real mania should surely be treated (regardless of cause). But there is an interesting gray zone where I think it's more difficult to say if the problem lays with the patient, or with his/her social surroundings.

For example the Swedish journalist Ola Wong recently shared his story on national radio about going hypomanic and then full on manic during the Swedish "refugee crisis" in 2015. It was quite interesting to hear him describe how he just felt that his social surroundings of journalists and opinion makers had gone mad when they refused to acknowledge there were potential problems associated with accepting 160k refugees in a single year (relative to population that's like if the US accepted 5.2 million refugees in one year). After "banging his head against the social wall" for a few months he became more and more agitated and restless, and finally needed hospitalisation. Just weeks after his hospitalisation the debate climate turned around 180 degrees to agree with Wong. That probably helped his recovery. He seems to have had no psychiatric trouble before then, or after.

Now, was the problem entirely with Mr Wong? :P