You are some 2-3 km in the air. There’s nothing to hold on to. You are sitting on a piece of cloth that is barely large enough to accommodate you. No railings, no seatbelts, nothing to hold on to or stop you from falling to your death if the carpet gets into turbulences or a strong gust of wind makes you lose your balance. And let’s not forget that most depictions of magic carpet flights have the carpet move very erratically because they have a mind of their own.
In ‘Rise of Endymion’, the ‘Magic Carpet’ creates a kind of force field that keeps its occupants in, and the wind out. But you can still slam and splatter into lots of bits if you hit a rock wall. The force field isn’t that powerful.