If there isn't a community on Reddit for something, what are the odds people are going to flock to a new platform? The quality issue is because these groups are generally peer-organized and some groups have better organizers. But like, what is technology going to do to make a better Reddit for people with depression, transgender people, people whose partners have cheated on them and people with incredibly rare medical conditions? Those are disparate groups that only have the common thread of needing a support group as far as I can tell.