Do you think people here undervalue accurate gunnery in AH?
In general, yes. They tend to separate shooting and flying, without understanding they both rely on the other and are intimately continuous extensions of each other. The AH community tends to view these two aspects as separate topics.
The statements "Oh, he can fly well, he just couldn't kill his opponent fast enough" and "He's not a great pilot, but he's a good shot" come up repeatedly in AH. And that's fine, because the longer people hold this view, the longer they stunt their growth and remain easy targets.
I disagree with your assessment. It takes a helluva lot of practice and some people just come by this skill naturally. I push my guys to practice gunnery drills constantly - like a broken record.
You disagree with which assessment? That the average pilot doesn't understand the tactical value of gunnery? I can guarantee you that as long as the term "HO" remains in use, and arguments along the lines of "I can fly well but not shoot well" come up, then the populace at large does not understand it.
Shooting skills don't really come to people naturally. What can come naturally is the ability to abstract and mentally picture objects in how they relate to each other. That's not a shooting skill, it's mental perception (as a random sidenote, the military tests and scores this ability as part of the ASVAB as well as on other tests). When a person or player realizes that this is what shooting is, then the problem is solved.
If you do see the value in it, that puts you in the minority.