Yes, that was odd ... I didn't quite follow why they didn't wheel out Peter O'Toole or someone for that. It would've been better.
It was just such a muff job. So much money spent, such a great marketing campaign, superb effects - they should've just had a few stand-in actors rehearse a draft of the script ONCE in front of a psychologist, a biologist, a biochemist, a geneticist, a philosopher, a philosophy/history of science type, an expedition leader, a surgeon and someone like James Ellroy - and especially a fucking OHS / hazardous conditions consultant! - and equipped each with a large plastic hammer with which to beat Damon Lindelof when something stupid came up.
Surely with a budget of hundreds of millions they could afford to bring a few experts together for a week, for maybe $100k all up, to doctor the stupidity out of this thing?