Men might not face lower wages and opportunities, fear of domestic violence, ingrained sexism, etc. that women do, but they do have issues which disproportionately affect them.
Having a focus for discussion of suicide, loneliness, toxic masculinity, etc. is a great idea, and it doesn't affect us at all.
Unlike women's issues, theirs aren't generally caused by the opposite sex, though.
Often, on here, we tell men "if you are so concerned about a men's issue, go organise your own day/event", and that's exactly what they've done here, so good for them.
And that heartless twitter comment above is identical to those comments about domestic violence against women, where people pipe up with "but men suffer from DV too".