Not so much. One has the freedom to explore and subscribe and participate in communities across the lemmyverse (mostly) regardless of what one’s home instance is.
However, one’s home instance often has quite the influence on one’s… perspective and one’s exposure— even one’s intended exposure.
For example, one will probably have a notably different experience if one starts from Lemmy.world vs lemmy.ml (or even lemmygrad.ml) vs lemm.ee. Or, especially Beehaw.org. And that experience may color how one views how one experiences external communities.
My point is that it’s mor complex and nuanced than you’re giving it credit for.
A YouTube link is not a counter argument. If you have an argument to make, make it. If you need to back up your claims, use reliable and verifiable sources. YouTube is not one of them.
Jack Dorsey is clinically insane. Stop listening to things he has to say.