It's significantly more ridiculous to expect that every battle will have the exact same result every single time. I'm sorry your pikeman missed, Melly, maybe you'll actually have to think about what you're doing now!
You can sound like a real douche when you want to, did you know that?
What I'm saying is that what you said actually improves the game for me lessens its strategic appeal. When playing through some of the single player missions, where you have units that you cannot let die, having those dice rolls can cause for too much aggravation. So my unit was on superior ground for its type, but managed to miss two attacks in a row, while the enemy hit twice, killing it.
It makes you feel like you're not in control of the situation, that the gods of luck laugh at you as you try to gain terrain and devise clever tactics only to break your knees when the dwarf rifleman that has literally 50/50 chance to hit anything gets a lucky shot and deal ridiculous damage to one of your key units.
A bit of luck can spice a game with a few interesting unpredictable events, but when every single action in the game (that I remember at least) requires a dice roll with chance for complete failure, then it feels like the game should feature in a casino.
But we've taken this tangent far enough as it is. If someone makes a Wesnoth thread I'll continue elaborating.