Five eyes governments like having the power to shut the finances of dissidents (see Canada seizing trucker bank accounts, FBI-partnered NGOs getting Trump supporters deplatformed from financial services). Any digital currencies created by governments will still have this same mode of failure by design.
more to the point, it's useful to be able to do it via soft pressure on private banks rather than hard power
Not creating a taxable event logged on your 8949 everytime you spend 'digital money' would be a nice first step.