To add to the already excellent feedback provided, and to tie back to the core idea of decentralization - governments, particularly the U.S., want to be sure that their citizens financial (and even moreso "moral") interests are protected. They prefer not to have their citizens engaging in illegal activity, of which the most popular activity I can see wanting to regulate is the online crypto gambling industry. In order to do so, they have to be able to tell who is spending, and where they are spending it at.