Yes, I see what you're saying. However, I might make a couple of distinctions. Gymnasts employ extremely high-tension in some of their movements whereas the study I referenced points to generalized fatigue over time. Also, powerlifters are big ... but not jacked like bodybuilders.
I guess what I'm saying is that using a weight that enables you to crap out after 20-30 reps is FAR lighter resistance than either the gymnast or powerlifter is using.
The takeaway here is: L-I-G-H-T.