But the point still stands because your trading partner has the info. If a government wanted to figure out who owned that UTXO all they’d have to do is press the sell who’d give up some random person they don’t know in a heartbeat. Or the government could be the seller just pretending to be a bitcoiner looking to sell some coin.
Discussion
Think of the effort required to do this vs simply asking an exchange with tens or hundreds of thousands of customers to cough up the info. No one is saying you might not grab a couple hundred bucks from a spook, but there's a huge difference from having the entire history of everything you ever did with a single entity.
