Nah I mean it pretty literally. You are very right that the necessary physics isn't really there, this is a really difficult thing to state rigorously. However

Nah I mean it pretty literally. You are very right that the necessary physics isn't really there, this is a really difficult thing to state rigorously. However I would argue that the underlying reasoning emerges out of fairly fundamental physics.. and that while difficult to state rigorously the core idea is kindof... obvious... to anyone with a strong physics background...