If you listen to the dialogue when you assign teams it has clues as to who to pick. With that one I think Miranda says something to the effect that Jacob (who volunteered) wouldn't be able to open it quick enough and that it needed a tech.
Just like when you needed a biotic to get through the swarm it's implied that while any biotic could do it in theory, a strong one (Jack or Samara) would be best.
Yeah, I thought about that afterwards. And I did pick Jack for the biotic part, so that was good on my part.