Bob:
...he can fine-tune his knowledge for that particular elevation and be more consistent over-all.
This was Hu's point, and I understand the idea, but controlling one variable (elevation) out of several (speed, distance, tip offset, ball/cloth conditions) in exchange for harder aiming and greater tip placement sensitivity doesn't sound like a net positive to me.
Also, the argument that "pros do it better" is irrelevant to the general principle that jacked up is worse. They shoot better with the proverbial broomstick too, but that doesn't mean they shoot just as well with anything (or with any elevation).
pj
chgo