Strategy and tactics principles for Heroes of Might and Magic IV.

You are absolutely right. Everyone has their own preferences, and I am no exception. However, in a document like this, I shouldn't ignore the preferences of other players, especially if they are quite reasonable. I can only add my own comments about one or another tactic.
At level 30, the hero will indeed easily defeat everyone, but to become that strong, he needs to go through levels 1, 2, 3, and so on. This is the most difficult part; you can't do without an army, and it is at this stage that you need to determine the line of strategic development (and hero leveling).