My theory, ski the zipper line when at all possible. When conditions allow.
Otherwise, use the technique and method necessary to make a successful run. Whether it's in the rut, over the top, on the sides or a combination of all the above.
Yes, I can agree with that and if you simply take away the man-made moguls, techniques would change to deal with bumps and lines that are random. Granted, not every turn was perfect in the 1987 video from a few pages back, but it was skillful and it was real. The WC skiers of today are also very skillful, even amazing in some ways, but the whole thing just makes me sad cause its fake.
I'm not quite sure what your point is, but I loved the way the winner skied (American from Vermont). Very quiet hands and upper body, fast feet and knees, totally in balance. I'm still not a fan of fake moguls, but that girl can ski. Granted, skis not on the snow long enough to actually "carve" on the theoretical front, but simply impossible at that speed.
And anyone skiing moguls at speed is going to get hurt over time. I couldn't walk up stairs in my 20's and had a very smooth, low-impact style in comparison to my comrades of the day. Regardless of the chosen technique, you simply can't eliminate all the extension/retraction and absorption of impact that is required, not to mention crashes - it is what it is.