Nothing is absolute, but it is common enough to be a joke in that the stereotypical male must be coerced to seek the help of a doctor. Many males resist admitting what might be perceived as weak. Usually with subjects like marital discord, depression, mental illness or suicide, it is the female who is more open to professional help. Whereas the female sees the value of pro-active intervention with therapy, the male sees therapy as a last resort.
I believe that as long as mental health issues are viewed by men as a fundamental weakness, they will be less forthright about discussing the topic than women. Many men are still raised to be strong, "the one to be leaned on" and breadwinners. Although reality shows that most women work outside the home today, old stereotypes are so conditioned within society, they remain difficult to dispel.
The mystery of nature versus nurture plays a part in this question, too. Just like our canine companions, who still react in ways described as typical "pack behavior" patterns that no longer are relevant today, patterns may be biologically built into human "survival of the fittest", that were more relevant to our ancient ancestors. It may well be that those attributes that defined men and women when survival was physically "extreme" are still within our genetics, making them more instinctual than logical, yet impossible to expunge.
As a general observation, women still tend to form close friendships with other women that include baring their soul. Men, also value same-sex friendships, but usually on a different social basis, hanging out with the guys, playing pool, poker and having fun. Women have fun with the girls, too, but consider in-depth conversations about real daily struggles and issues at home valuable, social interaction. Women discuss everything often, whereas male bonding may include occasional serious discussions, but it stills seems to be the exception. And, as with anything that involves human beings, there are no cookie cutter absolutes. There are always exceptions.