Most people don’t pay attention to things around them and don’t tend to care unless it directly impacts them.

As long as you and other mods are carrying on in your roles, these people have no motivation to move.

If the subbreddits stop being moderated it will generally degrade the experience, people will become impacted and then be forced to take notice.

This is the gamble, someone might step up, they might decide leaving reddit is too high a price or you might cause people to migrate.