Men are just as likely to ghost people as women are in my experience, so while this is probably a factor, I don't buy it as an explanation.

I'm leaning towards the idea that most people are cowards, although there is probably more to it than that. If you ghost someone all you have to do is forget about them and don't worry about it, no thinking or emotions of any sort involved. I seriously doubt it is that scary and difficult to get over enough to at least text someone for that many people. Either most people are such cowards they don't want to experience even that much emotion if not absolutely necessary, or they care so little about other people they don't care at all how their actions effect them if they don't have to see it.

Either that or most people are so oblivious to other people they don't get why getting ghosted sucks.

Anxiety alone doesn't explain why ghosting is so common. There are other factors going on.