In my experience the take off phase is more critical in regards to flight safety than the initial landing:
The aircraft is heavier plus more power needed than on landing.
The 2 extra pairs of eyes are busy with the casualty.
The low level (250ft) fast jet airspace is more difficult to check.
Lots of doors have been opened on the ground and shut by various people.
The front left seat is probably unoccupied.
The way out and up is probably not the way down and in.
Strong wires can be quite thin.
The casualty is screaming.