If we were to do this, we wouldn't just pick someone so out of the range of what's needed. So basically, if you reframe your question, would I hire a 70 average student on a team of 90 average students? Yes. We would not pick the 50 average students. This is all possible within reason, the kind of stuff being discussed in this thread is to purge people who are 80 average students (free riders in a 95 average class).

Will we need to tutor and support the 70 average student? Yes. Why would we do this? It's good for the soul. The stuff I'm talking about has no place in business, as far as we care to understand as a society at the moment.