So the 4E solution is to have "wish lists" so that the game campaign totally revolves around the PCs and items they find should be ones appropriate for them.
As a DM, I find this unpalatable. It just seems wrong that the treasures of the world should revolve around the PCs and if they don't, the PCs cannot even acquire the basic "big 3" sufficiently to adventure because of the sell and craft rules.
Two points.
1) The treasure tables give you enough gold to craft/buy a singular magic item at that level; At level 3 that means you have could potentially craft 3 magic items, 2 reasonably.
2) Your purpose at the table is to craft a story. D&D -can- be a sandbox game where the players are inconsequential pawns in a world that exists regardless of them...
...but that's not what it's trying to be. This isn't Warhammer Fantasy.
This is D&D, where the players are heroes about to engage in adventures that bring them greater and greater glory leading to an eventual ascension to immortality. The tale that the rulebooks suggest is an epic tale, and that seeps into every aspect of the game system.
Look at King Arthur. What is the first thing that comes to mind? Excalibur. Why? As an magic artifact it suits him -perfectly-. It wasn't the -power- of the weapon, it was the prestige of it, an icon that represents the hero.
I mean, you have rules that are based around the idea of 'hit level 30, then live on forever in either a physical or metaphysical or metaphorical manner' There's a definate goal in character progression: Immortality.
Immortals don't find random tools, and wonder what to make of these various useless MacGuffins. They find Sandals of Hermes because they need it. They find the Aegis, because they'll need it to kill the Medusa they didn't know was there.
But regardless, the ONLY difference in this regard between fourth edition and previous editions is that in 4e, the base assumption is that Paladins will get that Holy Avenger sword. In 3e, the base assumption is they'll randomly find one.
Strangely, I've never seen a Paladin without a Holy Avenger sword in 'randomly generated loot' games either....