Using the TM jacks to change a tire

[JohnUSA]

I've read several posts regarding changing a flat tire. Some people advocate a bottle jack on the frame, and there have been other comments simply use the jacks at each end of the TM to facilitate changing a tire.

I don't know if I'm missing something in the translation, but why would you opt for a bottle jack if you can just run up the corner jacks that have no chance of slipping?