Made up statistic, but I'm willin to bet 90% of the forum population aren't rankin Mages and could actually use the flexibility of IW to increases their dps substantially, but because of jacked mentalities like yours they feel obligated to use the "best" talents and end up doin even less than they should have.
I was even nice enough to provide my source for my information which was Lhivera's blog. If you are too lazy to even properly read my posts, don't bother responding.
And if you push off IW's cooldown or use it without lining up procs beforehand you're losing far more DPS than you gain by taking IW because of DPS loss during burst windows... just like I said and is repeated in the source I linked you that you completely ignored. And that's always the choice even when optimal IW usage is available you either: A) push off its cooldown to wait for procs or B) use it without lining up procs beforehand greatly diminishing its benefit.
I already linked my source but here it is again: http://lhiveras-library.com/content/level-90-mage-talents. The realistic gains from Invocation for Fire and Frost are not "barely ahead" of the passive IW. The difference is more than 10% DPS except in the case of Garalon where you're pawning off your survivability on the healers. That's suboptimal play, not "screwed up thinking". You don't do good DPS when you're dead and you don't down content when other people are dead because the healers are oom because you wanted to play it easy rather than safe. Even normal mode content has tight enrage timers, especially Garalon the only fight where IW is even viable (or Stone guard when Emerald is up, which is 3/4 raid weeks).
The only actual important part is that IW is most definitely worse for controlled burst windows. Obviously you cant use the burst except for when theres damage goin out, meanin there are several times where you wont be able to gain a burst when you need a burst (Elegon bein a prime example of this).
No the important part is that mage DPS is dependent on high damage spikes during burst windows like Garalon legs, FoF/Brain freeze procs, icy veins/combustion/arcane power, and any of the other smaller burst windows that are always optimal for Invocation users and sub-optimal or micromanaged for IW users.
People should be listening to people like me because my well thought out, reasoned, and sourced arguments that point out that 1 talent is clearly superior to all of its alternatives for all 3 specs is the best chance we have for blizzard to seriously consider changing the Tier 6 talents. If all three choices are (incorrectly) seen as substantially equivalent, we won't be seeing the QoL changes mage needs.
No one is holding a gun to your head. Its a fact that Invocation is substantially better DPS than its alternatives for Frost and Fire while also providing vastly more survivability than IW in all circumstances. Can you run IW? Yes. Will it nerf your damage in almost all cases? Yes. Will it hurt your survivability? Yes. Its sub-optimal, and pointing that out doesn't make me a "jerk". If you don't want to use it, then don't. But don't act like you aren't willfully hindering your performance by doing so, making up numbers out of wholecloth like "invocation is only a 7% gain" ignoring sources you've already been given to the contrary.