Re: the market doesn't always work
but this story is exactly the point, the market does work because customers demand better cheaper alternatives to what is already out there
The customers can demand all they want. If the suppliers can't make a profit on a product, or can't make as big a profit on a new product as they are on an old one, it'll never get put on shelves. One of the downfalls of a free market is that no matter how much the people may want a vaccine for the common cold* they'll never get one because there is so much money to be made from people who get a cold every year or two.
*Yes, I'm well aware of the challenges and probable impossibility around an effective rhinovirus vaccine. I'm just using it as an example.