I can also see this in the obligatory car example: your car has the same engine as a nicer model but is just de-tuned with software. Is buying a Mercedes C63 AMG and flashing the ECU to unlock more horsepower effectively "stealing" the SL63 that has the full horsepower unlocked? Of course not, because you still have a C63 and not the SL. In the case of the GPU, you not only get no "professional level" support; you void your warranty (this second part probably also applies to the car).

Is a professional going to risk it to save a few bucks? I'd bet not.