Maybe that would be because almost all helicopters have skids and so to move they have to leave the ground which therefore requires the pilot to actually fly during their flight, a concept you seem to have difficulty understanding
"
almost all helicopters have skids" Not all Helicopters have skids, as you seem to be aware - and therein lies the
slight disadvantage I referred to. Thanks again for yet another 'productive' comment
To put your mind to rest, as a pilot I have a sufficient knowledge of the definition of flight.