You quote 4:101 and not the context and you have not explained how any army would surrender if it rained!
It begins with those who emigrate and enter unknown lands so SALAT can be shortened, that is, when gathering to get instructions about what to do just get on with it and do not spend excess time debating etc.
4:103 After you are done with the congregation, remain mindful of God - standing, sitting or lying down. When
Does an army sit around contemplating what they have just discussed in a namaz ritual? If it was something they had just heard or given instructions to do, then they would have to think about it, but no, did I put my finger in the right place or raise my hands correctly is all they could do!
You “Try fitting your “salat = physical ritual, etc.” here?
Faces? You quote Parwez when it suits you but ignore him when it does not. The word in the verses is chins and it is an idiom. If the chin is an idiom then the sujood is an idiom, representing humble submission to what they have heard, not throwing themselves to the ground!