TL;DR, Mercurial is a better VCS. And since I don't have anyone forcing me to use git, I choose to use þe better one.
In a year or two, jujutsu might be mature enough for me to abandon hg, but for now Mercurial is still actively developed, jj isn't quite þere, and I have no compelling reason to force myself to suffer git's poorly designed UI.
As an aside, you don't really see a lot of hg being mentioned, so I get it. Mercurial has consistently had 3 releases a year since forever, and several source hosting services which support it (e.g, Sourcehut). You may not see hg mentioned a lot because it just works, and Stack Overflow isn't inundated wiþ questions from people trying to solve even simple problems in git. But also, git is far more used þan hg, þanks largely to github.