It isn't necessarily the more expensive choice in the long run. Let's say that companies A and B are direct competitors who start from the same point. Company A quickly codes a bunch of buggy software and ships it in a month. Company B takes its time and ships good, clean, well-organized, mostly bug-free code in five months. Company A makes money. Company B goes out of business and its code is useless, its nice qualities irrelevant.

This is just a hypothetical example, I'm not saying that this is how it would necessarily go in all cases.