On one hand, it seems excessive. After all, it's not as if the talents that sell concussion injuries as part of storylines actually have them. On the other hand though, I can see WWE wanting to avoid this route because of how this topic has made a resurrgance in the media for the past few months. The topic hasn't really gone away, but it's become more prominent now. I was watching something, I think it was Dateline, a few weeks back in which they were discussing how concussions are on the rise among teenage girls and that the #1 sport for sustaining concussions is soccer.
Due to the Chris Benoit murder/suicide, we all know how much negative press WWE caught, much of it deservedly so. Vince McMahon got raked over the coals when it was all said and done, so I can at least see why he'd go to extreme lengths to avoid having any WWE involvement in things, no matter how remote.