Havoc,
or he could have said "I have CONTROL"
that's what Tee Emm was saying.
It is reasonable to assume that the captain was more-skilled, and therefore, had he been flying the approach, wouldn't have placed them in a position where the GPWS was going to go off in the first place. That's what Tee Emm's thrust is. While the option to Go Around is always there, one doesn't deliberately increase the chance of having to do one by letting the FO do a difficult approach.
Possibly, they decided that a right circle with the FO flying was a better option than a left circle with the captain flying. In that case, that was what they were stuck with...