And that's not just about some technical capabilities of this or that software, but also about power dynamics (yes, they exist on fedi too, to some extent) and about building a network that can cater to anyone's needs and where everyone can feel safe.
As much as Mastodon-the-software-project is a fantastic piece of software and is by far the most popular instance software on fedi, identifying the whole network with a single project alone means that project gets to decide what is possible.