They are deprived of the payment they asked for in exchange for someone viewing their work.

Also, "the pirate was never going to pay" is a far more imaginary thing here; it's an unproven claim (especially since it's often paired with "pirates would pay if it was cheaper/more convenient to access).

Regardless, it strikes me as a particularly arrogant kind of entitlement for you to violate someone's terms to enjoy their thing while telling them you think it's worthless.