>>726260because individuality means being the protagonist
men are the protagonists in our culture so it looks good to be seen with a woman because it is an achievement
but women are not, you have to prove you have agency, and being seen with a guy automatically puts you in the sidekick category
on the other hand, I don't know the name of the girlfriends of my male friends, they don't really talk about them, so to some degree men do this too. maybe the writer of the article was surprised because she found women with hobbies or something else besides just having a boyfriend
and it also has to do with ease of maintenance, you don't want to redo your entire social media presence every time something happens, so it's more practical to never post pictures with your boyfriend. men do the same, kind of