The point is that it is entirely unrealistic for armies with who traditionally fought on the (strategic) defensive,
It's unrealistic to bring this type of army in tournament! If you want to play only Historical encounter, you'll never play Mongol against (say) early scot
If you want enter in tournament with at least a historical encounter you must think about new tactic and not historical ones!
Teutonic wanted fight Mongol with their usual tactic and they were crushed!
only 6 armies in lost scroll and only 2 of them who can't have an ally who gave them missing horses...
In EOTD all army who don't have horses have Nellies, not a nice option to enemies horses.