I feel like this problem is just part of the reddit/Lemmy model. 15 or 20 years ago, on an internet with different forums under different domain names on different hosts owned by independent admins, no one would ever be mod of 1000 different forums.
The problem is now that people don't want to go to obscure forums or take the time to register accounts on dozens of websites. Everyone wants to be part of huge social media silos. Things like Oauth account creation might make that easier when users can do things like "sign in with Google." Federation through sites like Lemmy could make things better since one account can access every other instance, but I don't see normies ever adopting federated platforms unless each platform has an instance that becomes "The" instance where normies can enter "Lemmy" or "Mastodon" into Google and have that instance be the first result.
The world elites have a huge interest in keeping people in centralized silos because it makes it much easier to control the population when they're gathered around only a few websites.