Just Wondering....

I asked the doctor I saw today why it is that they can replace hearts and lungs but can't figure out arthritis which mostly everyone will eventually get. He did not have much of an answer except to say that the infusions such as Remicade and Enbrel and Humira help. I say they don't help that much, and for the $6,000 it costs to get Remicade for instance, it should help more. Just wondering.