In many industries, the extra time and effort that would be required to lay out the rationale for the various tests and carefully explain the link between the results and the performance of the product under conditions of actual use (e.g., why it was a good thing that foam would come apart before the glue would fail) simply isn't worth it from a business perspective. The reasons why not vary with the business and the product, but if you have to do a lot of testing and invest this effort for every test, the value of the product itself, in terms of ROI on that investment in the form of profit, the cost will make the product unattractive as a business venture. On the whole, products with medical application offer a higher ROI than many other products, and therefore are more likely to be worth this investment.
