My point is that thoughtlessness is by definition evil and that working under that assumption is better than not. You disagree and that's fine. We won't really reach an agreement over this by arguing I don't think.
Additionally, as I mentioned, thoughtless action is subject to the changing environment. What is considered good now is different from what was considered good 100 years ago and what will consider good 100 years from now. If your actions are thoughtless you are simply a product of your environment, no matter how warped and disgusting it may be.
If your environment rewards small good actions, you're not actually acting righteously, because you're just reproducing what's expect by your environment. When the environment turns sour and what's considered good starts becoming more and more warped, you will not have the will to resist it because your actions are thoughtless and not righteous. You will fall into evil, like everyone else, swept moment by moment, without caring about what you're doing as long as the environment responds well.