In fact, in the aircraft used in Qantas cadet pilot training (mostly Aztec) and after a rigorous risk analysis, Qantas went further, and required that, once the gear was down and the flaps out to any setting, even on all engines a landing was required.
might be fair enough in a training environment but would be very restrictive in a commercial operation.
oei g/a's are ok with sufficient talent and a bit of height. part of my training were a few go arounds noting the height loss before climbing again.
and its very rare you
have to land with full flap.