How is it irrelevant? Consumers should not support companies which engage in crooked anticompetitive behavior. Our choices should be based on something more than how they treat consumers.

It's like "blood diamonds". They might be all nice and sparkling, but really stained in blood. Do you think it's enough to look just at the external value? It's not enough. It's good to vote with your wallet, boycotting companies which engage in unethical business practices.