The flying wagons are not powered by the Force or magic, they were made with science and technology. Generations of evolution in learning and building are what led to those. They did not simply spring into existence.
I personally believe that while magic and the Force are similar they are often connected to separate energies, not unlike other species and beings that have special abilities even when they are not Force sensitive. While the Force is connected to everything, not everyone can utilize it, just as not everyone who is Force sensitive can use the other variety of abilities in the galaxy.