That was exactly my point. They could have had 50 extra seats on the ground in Tunisia if it wasn't for this consideration.
But we didn't need all those extra seats, there weren't enough busses to bring the passengers to the airport to fill the seats. We even had an aeroplane leave NBE and go to night stop in MLA due to insufficient busses which then repositioned in the next morning when the busses were available.
Never assume anything.