Well yes, but I'd argue owning a corporation is pretty similar. The right to organize in a form that lets you incur debts you're shielded from paying back isn't some kind of natural state, but a creation of law in order to encourage certain kinds of commercial activity. Things like corporate taxes are imo a perfect legitimate part of the deal, if a government chooses to impose them.

I do think sole proprietorships should not require registration as businesses or payment of a separate tax (besides any personal taxes), though.