But that misses my point precisely: if this was your buddy Josh, an appeal to ethics would make sense, but a corporation isn't a person. Publishers can't do anything else, just like moths can't help but fly to light. Bringing up ethics here is like bringing up ethics when your car won't start.
In most publishers, if an "enlightened" CEO decides to give up rights, he needs to justify the business value of that - and "the 0.1% of our customers who know what DRM is and care will buy paper versions of our books instead of getting a Kindle" is just not enough business value to justify it.
A CEO isn't being paid to make his company an ethical actor in the world, he's paid to maximize the value of the company. If a CEO's ethics regarding DRM don't agree with maximizing the value of the company, he'll say "I can't do my job because it's unethical" and be replaced with someone else.