I agree. Removing the wind effect is a bad idea. But then, I can also see why some people don't like how excessive it may sometimes seem.
And to be honest, although it may be perceived as the movement that is the problem, I think it is the audio.
The sound of the trees are way too loud in comparison with the rest of the ambient sounds it's mixed in with.
The audio in this otherwise wonderful game was not mixed very well at all.
If you look closely, the OP asks to "Reduce" the intensity of the effect, not remove it.
The Audio does work in line with the wind intensity, though it doesn't change the fact that as a package, it is too intense.
To be honest, in terms of level environmental audio mixing, they did an excellent job.
If anything, along with reducing (and if possible modulation) the effect, the audio would have to be tweaked in turn to reflect the waves of wind.
Since this isn't possible, I'd be happy with a reduction in intensity and mild variation in terms of visuals at the very least.