with Archery you can miss any number of shots and keep on going despite it as long as you stocked enough arrows. With Destruction, you whiff with a few Fireballs and you're out of magicka and screwed and either must guzzle a dozen potions (which gets my vote as the single most overpowering element in the game; potion cooldowns please) or carry around a backup weapon like a staff
this is the crucial difference between casting and melee or archery. Even with no stamina you can still swing an axe or shoot an arrow. Not so with no magicka
Magic, Destruction is harder to master.
But you don't only use Destruction to fight your enemies as Mage, you can use Illusion (and there is plenty enough useful spells in that school to make Destruction very viable).
And the part where you said "must guzzle a dozen potions" is false, in my opinion.
I play on Adept and I have yet to drink any potion at all.
If you want to discuss\comment how Destruction is at higher difficulty level then Adept (normal), then I can't answer to that as I have never played above Adept.

. It's just not as fun anymore. Too much is gone now, that wasn't before.
