I've had high hba1c and 'normal' hba1c (my lowest as a diabetic was 4.5) so I'm not having this argument to defend my own personal bg control. Because I've managed at times to get it down to normoglycaemia, I know how hard it is to do long-term - particularly if you are trying to do other things as well eg bring up a family; particularly if you are unlucky enough to come up against workplace prejudice; particularly if you are under a lot of stress, or very affected by other hormone fluctuations, or a number of other things that aren't your fault. For many women, periods can totally screw up bg control - doesn't make us stupid or lazy, we're just full of complicated hormones.
If these things haven't affected you, and you can easily manage normal bgs, that's great for you. But not everyone finds it easy even if they are trying very hard.
As for education and carb-counting, I agree entirely that a more people could benefit from it, I'm totally with you on that. I am a big fan of courses like DAFNE for lots of reasons...but I've just done a review of all the dafne evaluations (and the pre-dafne ones from Germany) and the average post-dafne Hba1c was still over 8%. So that's people who are educated and doing exactly the things you say - and it's still NOT EASY!