I strongly agree on everything except of that. It is not the purpose of a commander to take part in a fight the whole time, he rather serves as a deciding factor at the end of a battle by attacking the flanks, archers or fleeing troops. He leads. But if we don't get involved in fighting personally there is not much to do of what you would actually do as commander. This is due to the strongly limited tactical abilities and the deleted battle map.
If you would be able to actually command your troops in a proper way with skirmish tactics, pointing out which enemy to attack, arrow volleys, weapon choice, flanking maneuvers (even if it would just be without a proper battle map) you wouldn't have the feeling that you have to engage personally, because there would be so much to do and to try by fulfilling your actual role in a battle - hence that would drastically increase immersion and thus be a part of the soul of Bannerlord.