Lack of skill, investment in equipment and lack of open spaces are the main reason. I personally enjoy hill flying more than flights by winching. But for training I prefer winching as it has many advantages over hill based training.

In both training methods experience of instructors plays an important role. At Space Apple we have been training people using winch based and hill flying method since 1998. We are also into paramotoring, parasailing, power kiting and aeromodelling which add up to our knowledge and skill.