Great thread. From a slightly different standpoint (us being a manufacturer- although this applies to all the aftermarket companies that exist) you also have to take into account the research, time, development, labor, testing, etc. etc. Most companies aim to provide a product or service that is best tailored to the maximum amount of consumers- and in reality people's preferences are so different that there is no single product/answer that will suit every person. Thus variations are made and for the most part the simplest and most common features will be the ones that will go into final production.
If any company were to create a "perfect" product it would in effect cost you more. A "perfect" product would eliminate all customization or modification and consumers would be subject to whatever price said company suggested, reasonable or not.
