I think you have a very good point.
I've found that whenever I start doing that, the reader experience suffers, and that causes ad revenue to go down. Of course, I create personalized content with my name on it, so I have a more personal relationship to my readers than an e-how would, I guess.
People keep wanting to split the income stream from the reader experience, and I just don't think that's possible. Sure, you might imagine you can do it, you might take a look at ad revenue and somehow think the reasons for it are separate from the feel of your content, but it never works that way.
This same false dichotomy is in place no matter what business you are in. There is always a conflict between watching the bottom line and simply doing things that make you or the customer feel good. Being able to balance these two things, it's the art of a good businessman, no? A good businessperson creates a multi-faceted work of art that maximizes customer value while still providing some kind of trade that allows the business to keep helping the customer.
I think if anything, the problem is that if you were running a coffee shop and physically met with your customers, you'd be a lot more sensitive to quality issues and understand where they fit in with your whole business model. But on the web, it's all sort of faceless, and that encourages thinking of people as abstractions to be manipulated. This type of thinking always loses when placed against better standards (but quite frankly it might take a decade or more for that to happen)