The hubris of that statement could only come from a physicist! We would indeed have a foundation upon which to understand everything many things, if only we could keep up with issues like scale, events happening far away, and historical choices as you pointed it.
There used to be a flurry of them a few months ago, and I didn't block anything but I haven't seen any since. I suspect they were simply testing to see if it worked, which it did but it's annoying so they stopped? :-P
I don't see how that would accomplish anything though? On PieFed it would work, or an app like Sync or Connect that I thought people don't use much anymore, but in base Lemmy all it would do is mute the communities from that instance... which since Mastodon doesn't have communities should still allow the users to ping you endlessly, generating notifications each time?
I went from Reddit to Kbin to StarTrek.Website and when every action was taking >1 minute and needing to be repeated, switched again to Discuss.Online, which I am very happy with and remain to this day.
Except I also switched to PieFed.social and use that 95% of the time now.:-)
PieFed, Kbin died but lives on in its fork Mbin, Sublinks didn't pan out but was started (the PHP code is FOSS), nodeBB, and flarum.
You may also occasionally see posts from Friendica or Mastodon that also use the ActivityPub protocol, though the barriers to sharing those with the Threadiverse are somewhat high.
Fwiw, you catch more flies with honey than with vinegar.
I for one am extremely happy to see PieFed flourish, and one of my chief reasons to move to it 8 months ago was specifically to block lemmy.ml.
That said, I have no desire to "cancel" anyone at all - and the Lemmy devs are worthy of respect for their accomplishments, even as they also deserve some criticisms for the way that they run their instance.
I love how the future allows PieFed and Lemmy - and Mbin, nodebb, flarum, friendica, mastodon, pixelfed, etc. - to exist altogether in the Fediverse, without needing any of the others to die out. I even maintain accounts on both PieFed and Lemmy instances, as each currently offers features that the other lacks.
(also, if some of the lemmy instances were to be cancelled, then all of their users would come over to here... think about that for a moment, is that a desirable outcome to you? :-P)
It needs one more home layer so that it can reach home-ception!