At the end of the day I assume this comes down to means of monetization. If someone has some other means of making a living that is not directly tied into the social media platform itself, for example they are independently wealthy, then it's easy for them to create non-over-optimized content.

A common breaking point for creators is the ones where they have job X that makes a decent living, but their content starts getting popular and starts making a decent living. That's where the creator starts running into the 2 masters problem. Do they quit their job and make content only? If they do, will the platform decide to completely screw them over with an algorithm change?

Then you have a 3rd class that is just jumping into content for the purpose of making money by any means possible. All aboard the over-optimization train.