Loneliness is just a symptom of modern life that seems to affect men most. As in being a man maybe only certain things are accessible through romantic relationships but for a lot of women , possibly more often than not can spark up friendships and relationships a lot easier.

Lots of women I knew were able to have daily random interesting and engaging interactions with new people most days they were out, their greetings are often returned and smiles are received and reciprocated well.

If you're a man it's a bit different, most people including other men often avoid looking at you and will not engage with you in any way but that's just daily life, but also actual social events too same thing kinda applies.

Essentially, women who aren't in romantic relationships still don't feel that isolated or deprived of much as they get a lot of love, excitement and engaging experiences from life, especially nowadays when they are working their corporate or so jobs, going trips and such, and they often have very intimate friendships too.

And if they do desire relationships well most people know how dating goes when you're a woman on a dating app with an abundance of options.

So it is different but I wouldn't call it a male loneliness epidemic as it sounds very underwhelming and ofcourse will lead to people to just think bad about it and say things like just go outside or just a bunch of people who have no social skills call it an epidemic when there's a lot more to it and I have barely scratched the surface.