It is related to the Achilles Heel of Fediverse because it is all FOSS. The big tech forces are out for the eradication of FOSS, and many people overly critical on perceived weaknesses of FOSS (e.g. in terms of UX) - even when they align with its values in general - are (mostly unwittingly) helping these forces to win. And corporate-internet-galore would be the result.
Update: I have taken the FOSS part to another thread: Why does Humane Tech need to be open source? - #11 by aschrijver