If we rank fish by species, can't we also rank them by family? And as the native species, shouldn't the brook take top billing? If we declare the native fish to be number one in our hearts (as I have seen countless people do in this forum), shouldn't we then keep any rainbow or brown we catch (of legal size of course) in order to give our favorite a small leg up?
I am not looking to open the door again on the impact keeping fish has on overall population, now we are talking about theory and ethics, so the fact that killing a few rainbows will have little to no impact on the brookie population is beside the point.
Life is hard. But it's a lot harder if you're stupid.