Things aren't sufficiently bad yet for the average person to consider doing this since the present way works well enough for them. These things happen gradually

Things aren't sufficiently bad yet for the average person to consider doing this since the present way works well enough for them. These things happen gradually in the beginning, but after a critical mass of people have heard, considered and tried an alternative, it can become very quick. I don't think decentralization is inherently a non-starter and I don't see a convincing argument why it would have to be. It's a matter of marketing and UX.