Normal every day joes can individually contribute to building a service that isn’t corporate backed or controlled by investors. This means there’s no weird backdoor shinnanigans like shadowbanning or post being deleted/censored just for getting too many downvotes. The fact each instance caters to its own crowd but can cross interact with other crowds is an excellent balance between finding a community that you feel comfortable in but not being in an echo chamber unless you want to be. If a instance truly becomes toxic and starts to attract nasty hateful types of people it can be defederated so the rest of the lemmyverse community doesn’t have to deal with nutjobs and trolls.