The problem isn't ActivityPub (the underlying tech that drives Fedi/Mastodon) vs ATProto (the underlying tech that drives Bluesky), the problem is convincing people why they should care about decentralization in the first place, and why some of its trade-offs are actually worth it. 
ATProto will never be decentralized. It's not designed to be. 
It's built to make sure everyone's data is completely public so then it can be aggregated by centralized networks built from your data. While it can take in data from decentralized sources, the network itself (the interactions, the likes, the replies, the reposts) are all centralized to one network. It's why Bluesky feels so centralized despite claims to the contrary, because it is centralized. It's also why Bluesky will never have privacy controls, because it relies on everyone's data being completely public.
ActivityPub is properly decentralized, which is great if you want proper freedom from big tech firms, but a problem when the experience feels a bit disjointed. Fedi is awkward to join and to navigate, it's difficult to explain how it works, and, frankly, some of the servers in the network are run by shitty people who shouldn't be in charge of a server, but you don't know that until you join. 
That sucks.
The problem is that those headaches are worth it. We are immune from arbitrary ToS decisions, we can't be bought or sold to private equity, Trump can't come in and strong-arm us into giving a voice to Nazis, etc. Our communities are moderated by members of our community, we'll never have an employee who doesn't understand our subculture randomly decide to delete your posts, and we certainly won't have AI misidentify your post and randomly ban your account. We have really strong privacy controls because the network is built on them and not built on needing to suck up everyone's personal data.
Aspects of decentralizaton sucks, sure, and you're right to feel that they suck. There are plenty of smart people working on solving some of those problems, but in the meantime, isn't it worth having a bit of a learning curve in order to have proper freedom for your place on the internet?
#Bluesky #Bsky #Fedi #Fediverse #Mastodon #ATProto #ActivityPub #FOSS #Decentralization