Yes, you are missing something. The preferred option is for a helicopter to land and deplane/emplane its passengers quickly and with minimal risk. As soon as you introduce winching, it's an acknowledgement that the helicopter can't land. Winching increases risk and prolongs the evolution, especially if by some miracle they do manage to squeeze six into the back of the 189 and all six need to be winched down. Hover jumping is an uncomfortable but sometimes an expedient option if lots of people and kit are to be deployed.