This topic, like "cleaning" does not necessarily have to become a controversy. "One size" may not fit everyone needs, or tolerance for increasing the equipment and time to add another step in the reloading process.
Shooters who anneal do so because they either have experienced the benefits or because they want to prevent poor results by maintaining as much consistency in their cases as possible.
Then there are shooters like me, who don't anneal and never did and who are content with the results they are obtaining on target and most assuredly do not want to add more equipment, steps and time to the reloading process. For some of us, reloading is a necessary burden and it ain't fun.
If you are in the ultra-precision game like the benchrest guys, it kind of makes sense that consistency in ammo is paramount. It would seem that annealing achieves that so there may be a need for it in that discipline. I won't engage these guys in a reloading debate because their accuracy standards are so much higher than mine. Just look at their targets, the successful ones know what they are doing in the world of ultra-precision.
In my game, in the world of practical field shooting I know what I am doing. There are so many variables, the shooter being the most significant, that wringing out a few more thousandths in group reduction is not worth the time, expense, and effort. Honing one's field shooting skills has a bigger payoff because there is so much less artificial support in the shooting position in this world.
I will borrow a concept by Ryan Cleckner, Special Operations Sniper, define what is acceptable accuracy for your needs. Once you do that, you have a standard to work towards to adapt and test your reloading, cleaning regime, etc. against that standard.