I don't think your argument holds water. A while back I read some article about how search is handled in companies like Amazon and surprisingly one requirement

I don't think your argument holds water. A while back I read some article about how search is handled in companies like Amazon and surprisingly one requirement they have is appeasing key sellers. There were major political battles driving the decision on what search results should be boosted in specific search keywords just because a representative for company A insisted quite strongly that should be the expected result, while rep from company B had a very different point of view. I'm sure Amazon does optimize results based on conversion, but only fools believe search results are optimal based on concrete criteria. Also, some search results are clearly awful. Once I saw canned fish items showing up while searching for USB drives.