This is a solution for 1 single person. It doesn’t solve the greater problem that the experience is VERY inconsistent for new users depending on whether they got lucky and first joined a large instance or if they got unlucky and joined a small instance. It also doesn’t retroactively repair the horrible first experience that new users have with lemmy.
What you offered really isn’t an solution as much as it is mansplaining…and that’s not really helpful at all when what we’re talking about here are the perceptions of new users.
There really should be a link to this on every instance/communities page with a note that if users really want to see “all” communities, they must use a 3rd party search tool to do it.