The only problem with your comparison is that skin is NOT bone. I know you mentioned that, but that kind of disproves your comparison because bone takes a lot longer to heal than skin. But I do understand that you have been using chapstick for a long time, but theres still no indication that using chapstick can do this much damage. Also why it wouldnt affect our whole lip (I know your kind of does but it seems like most peoples' only affects about 2/3 of the bottom and half the top).
Anyways I have seen a little progress, which is the only reason I continue. I guess as soon as I stop seeing progress over a period of time I will have to move on.