Adoption against the inertia of an existing system will always be an immense problem, but we should not assume that people will always be as complacent about surveillance capitalism and privacy, and as happy with the incumbents as they are now.
Having said that, I think you are spot on in trying to find ways to ease people across this barrier.
One issue which you didn't mention, and which is at the root of the move to buy twitter is advertising - or more generally surveillance capitalism: the collection and exploitation of private information about humans for profit.
I use twitter a lot because the quality of sources and information is so good, given that I largely collate the sources myself. Bonus is that I get to exchange views with all manner of people, and to interact with them, from individuals, to specialists, politicians, policymakers, bureaucrats. Even the oligarchs!
Different groups use twitter for different reasons, so differentiating the main ones and figuring out what they would need to get them to adopt an alternative would be useful. The reason I started this thread was that I could see the move to buy twitter might provide an opportunity to bypass these issues. Because if enough people were motivated, and found they couldn't in the end buy the real twitter, they might be willing to campaign to move en masse to a SAFE Twitter.