Yes, I would say that is exactly the reason. So if there is a raging fire in MSCP1 what is more dangerous, MSCP1 or walking past the fire damaged but still standing MSCP2?
Looking at this Google street view, the fire exit route for MSCP1 hugs the outside of the building due to the railings so inside the building is deemed safe but outside the building is deemed dangerous. No doubt the railings were put up to stop people exiting the building in a hurry being run over. Oh and where are there a bank of EV chargers? Yes, on this side of the building 2 floors up.
Worth noting the identical building materials used for both car parks, built by the same company that went bust using the same construction methods. Now I wonder if the replacement MSCP3 will be a mirror of MSCP2?