You don't. You have to travel here to participate in events that take place in the bay area, but you don't have to move here. Founders with labs set up elsewhere have sometimes participated by traveling back and forth.
As a fellow midwesterner, I agree. It might make sense if the requirement was to move to a bio-rich region (such as San Diego or Boston), but the bay doesn't seem like the place to be for a lab.
I agree, and if they were required to move, it would take more than the 3 month batch to prepare items for movement. Why not just leave in their location?