If that would be true, men in male dominated jobs and with male dominated hobbies would not had the above problems - but they do.
A lot of suicide is when men retire, get long term unemployed or divorces (divorces are harder on men statistically these days). In two of those you cease to have "shared struggle", but not because women presence caused it. More like, people you knew disappeared. You are not useful to them anymore.
Workers don't share struggle, because most work is about struggle against colllegues, competition and people change jobs often anyway. Combined with working more then 60 hours a week, female presence is hardly the primary reason for lack of long term friendship that sticks as you get unemployed or sick. (I don't think the job should supply socialization, but it does for people working a lot.)
And men like you just described openly challenge those under them in hierarchy, but rarely those higher then them. So, I have reservations about that openness you talk about. It is less about openness and more about never saying you disagree with higher ups in hierarchy and lashing out when perceived lowers disagree or criticize you - because that is interpreted as challenge.