They probably will be adopted in the way people hope but I'm not "appalled". Firstly, as far as digital dollars we already kind of have that now the private companies are doing the same thing as the banking cartel. And secondly, the US is the world reserve currency so people have already been hoarding USD but admittedly not at this scale.
But I'm not terribly worried about it. Many people benefit from stable coins since they outperform their native currency ie Argentina. Stable coins do not have ngu technology so eventually they will fail to compete with Bitcoin. The stables give the usd and fiat a longer runway as far as life span and I'm not convinced that is a bad thing. But I do think alliance between stable coins markets and the bond market is going to enable many undesirable consequences it's to be expected. And finally, the fed is playing a dangerous game if they think selling a large portion of their bonds to stable coin issuers. Everything is good for bitcoin