Okay, I was there thinking, but how did actual medieval elite knights/commands and generals survived battles back in medieval era?
Lol take for example in crpg no matter how strong you are, you will get hit and killed, not talking about some random flying arrow.
So the big question is how. Luck? Very strong plate armor?
Sell important guys to Ransom brokers. Ramun the slave trader will give you only 50 denars for whoever you sell. May it be a 'vaegir knight' or just a 'looter', you will get same money. Ransom brokers will pay accordingly to the worth of their lives and if you catch King Yaroglek, his faction may pay you really well for him. Why would you kill him then?
It's an example from native single-player but I hope you can see the connection with rl medieval here. Kings/Leaders/Important people don't just brainlessly charge with 1st line so the chances of killing them by a mistake are small.
Also yes, painter was in the middle of the field of battle and just painted this quickly as that guy was dying there in the middle. Totally wasn't his imagination, no.
Also tincan armour and no helmet... nub deserved to lose the battle.