When a melee counters ranged champs, they get nerfed fast
When a ranged counters melee champs, it's healthy.
Examples:

Honestly, the one I hate the most is Kalista, if we could gut Kalista's passive to not be so obnoxiously broken, I wouldn't mind playing against her.
Examples of melees that dared opposed ranged champions:
(pre wither nerf)
Tell me there is no favoritism in ranged beating melee champs.
Oh wait you can't, immobile champs that do the same amount or less damage then some ranged champs exist.
counters getting nerfed.
,
and
nerfs come to mind.
+
= Slam Jam