Interesting to think on that mate. I manage 2 teams at the minute and hace 2 assistants on each. I dont do the motivational speech bit for either. I do the team talk around tactics and how I want individuals and groups to play. Then an assistant has 2 minutes before we go out to get them fired up. One lad is brilliant at it, ex Rugby player and he talks in a way I couldnt about fighting for each other, the badge etc. I bet it is more common than we think that someone other than a manager does the final rallying call before a game. I know some clubs where the captain does that for example.
Not in anyway calling your sides level, just at prefessional league level i wpuld expect the manager, assistant (which is what you do), coaches & captain maybe players, just find it odd a retired manager not involved in coaching comes & does it. Maybe it is more common that i expected, understand for example sides at world cups do it, one off gamez, but run of mill league on game. prob some of our issue we dont have a leader/ captain like bally to follow up from manager/coach
Agree mate that if you have a retired manager in doing it would be odd. We do it only from the inside of the players and coaches. We arent professional by any means but I wouldnt want to give a few quid to someone just to give the motivational stuff.