Bitcoin was created by Satoshi Nakamoto, to be a decentralized digital currency in the hands of people, so that they will have total control over the Bitcoin that they hold. Bitcoin gives it's holders freedom and privacy of transactions, so that third parties like Banks and governments cannot interfere. But the decentralization of Bitcoin has been a big concern for many governments around the world.
When Donald Trump, was campaigning for the presidency, he took a friendly stance towards Bitcoin, probably to get votes, now that he has won the election, many people are hoping that the US will have favorable Bitcoin regulations. Today Bitcoin has gone beyond p2p transactions between two parties, people needs to carry out transactions through third parties like centralized exchanges, also facilitate crypto transactions through Banks. This is the major area where government interferences comes in, they want to regulate cryptocurrency transactions by all means.
Of course, you've made a valid point, and i believe most people on the forum are acquitted with this issue of government interference, but let me start by saying Bitcoin was built in such a way that it doesn't offer a complete form of privacy. Transactions are traceable, especially down to centralized exchanges, and in most cases, funds can be seized whenever there is a complaint against someone. The truth is, decentralization and the government are two opposite things that might struggle to work hand in hand. So, even with the newly elected president who has been an advocate of bitcoin, we might not see any difference on the policies that has been on ground, but bitcoin will definitely strive under him.
Although I can't blame governments on their stance to regulate cryptocurrency, mainly because of money laundering. We however can't say that Bitcoin is totally decentralized if governments that are centralized have so much influence in some parts of it's transactions.
I don't really like this form of excuse, because i want to believe that bitcoin isn't the only valuable item used for money laundering, so we shouldn't even make this a big deal. The truth is, they don't just like the whole decentralization thing.