That's why every instance worth its salt will defederate from day one
They can already gather what's posted publicly ๐คทโโ๏ธ
others will either have to follow, or risk dropping out
Honestly, they should. Drop out of the spec if Facebook gains control over it, I mean. Fuck em, I don't care if I can't federate with Instagram, in fact I prefer it that way.
The problem with the idea that each community should be its own instance basically comes down to cost, both financial and time. If I want to make a community about something I'm passionate about I'd have to shell out money I don't have on hosting, buy a domain, learn how to actually host and administrate a Lemmy instance, and then spend like half of my time and energy maintaining it.
Not everyone is a programmer with programmer knowledge making programmer money.
I don't really care about Gargron and the other growth-focused admins, I literally use an instance that hides stuff from mastodon.social lol