There was an article linked to from there on Slate where this quote ended the piece "The most dangerous species of owner ... is the one who gets into the business for love."

That quote is both very true and very wrong. It's true that you can get into entrepreneurship with very idealistic values that drive you to ignore some of the more important financial aspects of running a business, and wrong in that if you don't do it for at least some type of love then you are probably going to fail for lack of passion.