The only fundamental difference inherent to the respective designs of blockchains and traditional banking, is censorship resistance through genuine self-custody. The former is designed to provide this quality, and the latter is not.
Put another way, there is nothing inherently scammy in using a distributed blockchain to record balances, and cryptography to authenticate updates to the balances. While opening the door to financial contracts to every one in the world with a computing device may make scam offerings more common, it's overly simplistic and lazy to resort to a caricature of crypto tokens being, as a rule, scams.
Articles like the ones you linked above want a return to serfdom, under the control of officialdom. There is no other conceivable reason why someone would not want people to have at least the option of taking custody over their own money, in a form more useful than physical cash.