I am hoping that someone can tell me my thinking is so off base that it is beyond belief.

As I understand the mechanism, bisphosphates work by coating the bones but do nothing to benefit the bones in any other manner. (essentially paint over rotten wood, or less rotten after a bone builder). So, when a DEXA shows improvement, what is accounting for the improvement is the thickness of the coating.

Please tell me I am oversimplifying to the point of absurdity.