I do not follow the line of your suggestion.

Please explain what fighting like a real war is, and how having a bigger infirmary will encourage more fighting like whatever it is what you want.

At max knowledge you can heal 50% and with a booster its up to 70% and during heal events you're at 90% this all depends on your infirmary bro. 

EDIT: Oh and when you lose a whole march, its only the 80% of the march you'll get to draw the percentage from. 20% of your march always survives. 

Well personally fighting in foreign kingdoms, Jotunheim and in my home kingdom I can't follow through on challenges because I fight higer level jarls with 40th level towns and I lose to many troops in each fight. I have lost billions fighting. I don't have billions in gold to resurrect my dead army. At the moment I am upgrading to a 36th level town, also.

Regular players need to be able to heal 50 percent of their army so they can either recover or continue fighting during a confrontation. It will be more cost effective. Yesterday, I found out that reviving and resurrecting troops allows a player to clear more checkpoints in troop events for extra rewards and players will be abe to pass daily and some weekly tasks. Yes, I found out about the infirmary upgrades later after this post.

My line of reasoning player xyz, is that you don't know 'who' I am fighting as obviously the reasons are quite personal. But it is jarls in this game who take events personal. So, I have to deal with these personalities everyday. I only need an increase to the infirmary to handle the amount of troops I am training lost to battle. And the fact of the matter is you personally don't know the outcome of battle due to the fact that with a high influx of healed troops will catch an enemy off guard when they are sent right back at them in a battle.