What you Seem to ignore is that my aspiration is to fix the flaws and come up with a Better system and you Seem to focus on the past and currency Which is just a small part of the picture. Control of nodes is just a reference to some current implementation details. DAO was also just bugs exploited. Being able to alter the current State of the Ledger doesnt make it invisible that you did it, or prevents others from not agreeing with you.

Im thinking about civilations destroyed or Winners of war rewriting history, or powerfull companies and poltiticians covering up information that was already out there... eg recently we found out its easy to delete from waybackmachine. If you cannot Imagine we Can build true decentralized tamperproof systems or could ever have a neeed for one i suggest you study human history.