Interesting thought of the one sport generation: Reports are that girls now from years of spiking the volleyball are having unprecedented amount of shoulder problems. Now those are high elbows!
The shoulder problemos of elite volleyball players seem well-documented, and (for me) pretty well close the case on high elbows at point of load -- that it is not desirable, that is.
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Again, it's one thing to say that a motion is hard on an athlete, and another thing to say a motion is TOO hard on an athlete.
Many volleyball players are healthy, right?
It's a compelling image: volleyball players "throwing" with elbows *as high as possible* :- ) and with shock at the top, yet only X% get injured... the O'Leary type amigos (excellent as they are) leave the impression that 100% of high-elbow athletes will get injured...
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Still and all, there is a % that gets injured...