Exactly. I somehow doubt Dorsey doesn't know about ActivityPub - why not just endorse it publicly if he genuinely cared about decentralization?

Are there genuine technical shortcomings in the ActivityPub standard that Twitter's engineering team has identified? Why not talk about that and contribute improvements to the standard?

Are there shortcomings to being part of the standardization process in the W3C? Then talk about that and make the processes better.

Is it that he needs his name stamped on a new protocol? I'm not sure we can do much about the terminal egotism of the ultra wealthy and its pernicious effects on our society. Solving this will take a tremendous amount of collective effort.