There is a lot of hokum and bad statistics in the medical field. Doctors truly don't have a great idea what improves post op outcomes.

There are some bigger studies coming out that show that early weight bearing is non-inferior to traditional protocols that ask for many weeks of NWB though, and given the obvious qol benefits of walking earlier it seems to me the standard should be mobilise ASAP.

There really isn't good evidence for immobilisation. It seems to be a hold over particularly for surgical fixation, where there's no real fear of displacing things if it's been fixated properly.