What kind of silliness is that ?

[WarBlade]

Let's say you specialized in Holy Shock, and pump everything to get eccentrically high levels of damage from synergies, etc. You still can't handle lightning immunes and you're 20-40 points less able to have a solid secondary attack that will.

In order to get "eccentrically high levels of damage" using Holy Shock and it's synergies, most people will inevitably buy an attack skill to channel it through. Often that will be Zeal, but regardless, you'll still be doing a Physical Attack. Hence Lightning Immunes only mean your character's damage will be cut down, not that you can't handle them.

After 1.10, Zeal with its Sacrifice synergy will be doing more Physical Damage too.