I wouldn't say you would be without morals, you're just getting the best bang for your wallet. Like everyone else does.
You wouldn't pass on a Lamborghini for a Fiat Punto if you had the opportunity right? Just because the company Lamborgini and the idiots running it, did a wrong call/something bad?
What you buy from their company, that is the best you can afford, doesn't have anything related to them, other than their profit... But how big of a profit is only your GPU to them in whole though? Not a whole lot I'd imagine.... But then I don't really have any knowledge of business etc, this is just what I imagine though.