No argument there, wind is THE biggest factor when doing LR/precision shooting, but taking an "average" would mitigate those who took shots when there were significant gusts present. Furthermore, I cannot see how that would change an individual's score as opposed to not adding extra score for the wind. A hit is a hit. A point is a point. No hit, no point. Whether you add on an extra 100 points for some prevailing wind speed in any given hour would not add anything extra to individuals' scores. I think you would have to do it from shot to shot in order for it to matter.
Example would be if you and I shoot at 2 different targets, five shots on each, in an hour. The wind is at 10mph, using your scoring proposition, we'd add 2 extra points to each hit. You hit three on the first target and two on the second. Granted one point just for the hit itself, you'd have 5pts in hits alone, plus 10 extra points for the wind (5 hits x 2 pts per hit). Total would be 15 points. Then, I go and shoot the two targets. I hit two on the first and two on the second, giving me a total of 12 pts, correct? You win, 15 to 12.
Now, what if we took away the extra wind points? You'd have 5 pts vs 4 pts. You still win.
My point is, there is no real pragmatic way to go about scoring the wind. In order for it to matter, you'd have to apply it on each shot. Doing that would be absolutely insane, as stated earlier, who would score it? I have scored a few stages in a few different comps, and believe you me, I sure as shit would not want that responsibility.
A hit is a hit, regardless of the wind speed. Wind is implicitly accounted for in scoring, hence all these super neat "wind cheating" calibers. If you're able to hit when it's blowing 20mph, you get the score.