I think many commercial clients care. Most other visual professionals know(art directors, designers, account managers, etc) and care about quality. Their jobs and reputations depend on quality in many cases. And they know. And all of this is not as suggestive as many think.
http://char.txa.cornell.edu/language/introlan.htm
What you like and dislike is suggestive. What is good or not is not as suggestive as many think.
Now the money question, if you really care about quality and actually yourself "know" what that means, how do you get to those clients that know and care?
Yes, commercial clients are an entirely different world.

