Your post confuseses the hell out of me.
Yes I agree more people could stand to TRY to stay leaner during their gaining phases but just because some caliper says 12.1% does that mean I'm not anabolic anymore? If someone is gaining size and is still at a leanness they can be happy with I don't see the need to shut it down and try to lose fat.
Then you talk about getting into really low bodyfat levels, why?
1100? How many people do you think can do that in the entire WORLD? And again, what does this have to do with what he's asking?
The last part I agree with, but without the 10-12% numbers.