Incompetence Considered Harmful

Found the post Incompetence Considered Harmful on a weblog I recently added. It reminded me on one of my favourite quotes: "If you think education is expensive, try ignorance", which is commonly attributed to Derek Bok (a former Harvard president). The Blog mentioned a research paper and I had a look. The most stunning conclusion: if you are clueless you not even can appreciate a sound solution or distinguish cream from crap.
It seems to me, that's the reason why a lot of sales people companies don't like experts from the field of the products or services they offer, since they would know high quality. Of course unless they made quality (result quality, not process quality) their core value.