This is true. If you believe that some kind of taxation is "necessary," or at least a necessary evil, then it can be said that Bitcoin will never be used completely freely as money. Of course, outright banning Bitcoin is not an easy task even for governments. But there's a much easier way. Rather than tampering with the internet, governments could simply make it illegal not to issue (government-reportable) receipts when someone pays via Bitcoin (or cash, gold, silver—anything enabling payments that don't leave a trace on the state's surveillance network). Then offer rewards for reporting or informing on others, and you'll have self-righteous Gestapo-like citizens scurrying around, eager to snitch, believing they're contributing to a just society. The result would be a society where citizens monitor other citizens.
If you truly understand what fiat money is, then you can understand what kind of entity a government is that forces us to use it—and understanding that allows you to grasp what taxes really are. Anyone who believes taxes and the state are in some way necessary thereby contributes to building a surveillance and control society.
There are even self-proclaimed "Bitcoiners" who loudly cry out for freedom when the government obstructs them, but cheer when it tramples on those they dislike; people who shout that inflation is theft when criticizing Democrats, yet stay silent when Republicans engage in money printing. Isn't that amusing?
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