Well, until proven otherwise, the answer to that question is: centralization and trust is a huge efficiency optimization. Just look at how wildly inefficient Bitcoin is as compared to all other forms of ... well anything. The reason we see such centralization is because it represents a huge saving in energy, in time, in money. That market incentive will continue to exist into the future. Even if alternative strategies take hold, there will be a massive market for centralized solutions - they will serve the majority of the population - so we will need to make this push one way or the other for that faction to be well served.

If that ever changes, we can stop the fight. To do so now is, to say the least, premature.