So we're in agreement that we need to have trebuchets introduced?
I think we could go back and forth for days comparing RL combat with DDO combat. There's an infinite number of things completely disregarded in DDO for sake of playability (examples: wind, intelligence), making our comparisons equally invalid. In my mind, it's easy to hit in melee combat (but difficult to score a major hit), whereas hitting with ranged weapons is notably more difficult... but nearly every hit is deadly.
Mind you, all the discussions about blocking apply to both ranged and melee. In "real" combat, it would be pretty difficult to hit a fighter hiding behind a tower shield... maybe even impossible.
The tradeoff of damage vs "hitability" is a fair one. Yes, if you stand your ground and shoot your arrows, you just may get creamed. But that's like bringing a knife to a gunfight. As you said, once they close within that range, it's time for melee combat. But during that time when you were ranging, you had little/no chance of being hit by anything. If you had decided to kite instead of standing your ground, your chances of being hit are still near zero.
Look at it this way: if fighters had a feat that would halve their damage but make them
unhittable, would they take it? The resounding answer is YES... in fact, it would become the new standard, expected of ALL fighters. Ranged combatants, when properly played, already have this "feat".
(you'll notice that I'm conveniently disregarding NPCs with ranged capabilities... a stationary ranger is an open target to NPC archers... but when you move back to kiting, they generally can't do much of anything to you).