Fully agreed. While it is morally positive to avoid especially unethical companies, ultimately it's not possible in all cases. As long as you try to be moral in your day to day actions and you on some level push for things to be better, you're not morally culpable for the failings of the current system.
They may be gross, but so is having rotten corpses sitting in the open. By getting rid of those corpses they are doing us a solid, so turkey vultures are cool in my book. The only animal that's profoundly not cool is mosquitos, they're a worthless species.