I agree, but take a small look at email. Email is the way it is currently (basically 3 providers, if you aren’t on their specific “good people” list then your emails get nowhere, residential IPs are considered bad by default, a single configuration miss dooms your server forever) because it was hard to maintain an email server, and even harder to combat spam. The fediverse is not immune to spam, but it does have the advantage that there is no expectation of privacy, and thus it is possible to have moderators filter spam. But that’s a hard ask. Email became that way because only large corporations were able to write good filters.