If by "expensive" you mean having to make 2 more clicks for some action, or installing 5 apps instead of one - then I argue that it's not that important to people to use those other highways in the first place. That's just not a high price to pay for anyone who cares about not being on facebook. If they are not willing to pay it, it is an indication that they just don't care. It seems that tech people have a hard time to realize this: most people are fine with facebook, knowing all its evils.
And of course the other platforms, they should keep improving and bringing those number of clicks down, and polishing up the UI, etc. But I just mean that they are already up there in terms of usability, at least in the same league.
PS. Heck, people can't even be bothered to spend 5 minutes listening about and 5 clicks installing adblock/ublock... I suppose that's Zuckerberg's fault too. /s