Completely agree with the comments here. For Diadochi factions it messes with the immersion of the campaign. The major Greek rulers were expected to lead their armies into battle or they would be perceived as weak and overthrown. Phillip II, Alexander the Great, Kassandros, Lysimachos, Ptolemy, Seleukos, Antigonos, etc. all led armies in person at various points.
These rulers typically commanded their best troops too. Can you imagine if Alexander rode with a few light militia cavalry instead of his Companions?