You should probably reconsider putting loneliness and depression on a pedestal here.

Mental health issues existing in the past does not mean they are not mental health issues. Besides, most men were neither alcoholics, depressed nor lonely.

Loneliness in particular is neither specifically masculine (like, is not at all specifically masculine, neither in history nor now). Nor is there a reason to believe was more or equal amount of it in the past ... when men were part of in person group pretty much regardless of what they were doing.