Even if social media like lemmy/mastodon takes over places like reddit/xitter, the difference is that the big corps have an incentive to keep you refreshing their services so that you keep seeing more ads and add more engagement. Therefore they focus on ragebait and dark patterns to keep their audience hooked and coming back constantly, regardless of their mental health.
The fediverse doesn't have these incentives as its run by users for users. I don't care how often you visit lemmy.dbzer0.com , in fact, the less people refresh the page the less I pay, and since I am covering my costs with donations, I don't have any perverse incentives towards the people and communities we host.