Old Fella,
I may be misunderstanding what you have written. If so, I apologise.
I was always taught that the salute is a sign of respect not for the person wearing it, but to their commission, which was given to them by the queen. Returning a salute is done so, by the officer, on behalf of the queen.
As for times changing, yes they have. Does that mean respect and manners are a bad thing? I see a lack of honour, dignity and manners as a negative. This is why I find myself disliking most/ all politicians. They appear to lack all of these. I will show my respect to the queen, and, if a person deserves it, irrespective of rank, to them.