Why Zed and Lee Sin need no items?

Why does master yi get a dmg reduction heal? Why does he get double auto attacks and true dmg? Why does he get to go invunerable.. Why does he get an attack speed steroid and move speed steroid that keep resetting when he kills sm1.. this champion is so unfair.

There now ive attacked your favorite champion with a weak argument.

Zed only scales with bonus AD so... that is by definition item dependency... Too much weed man..

Zed's base damages are mediocre, hell his entire burst is mediocre and very slow compared to....literally every other assassin. Hell a full AD nocturne can burst faster than zed.

Lee sin has high base damages at the cost of most of his skills barely doing damage later on in the game because he builds bruiser. So technically when people get more items lee sin gets weaker.

I don't know what you're smoking but man gimme some of dat shit.

Because 1) Zed doesn't, so shut up and 2) Lee falls off heavy later in game, so he gets good bases.