Licencing a design is definitely a way to lock people out of solutions. Making objects for someone is an honest productive work that deserve retribution.
Licensing designs is making licence owners lose contact with communities and dive into the whole copyright question and the greedy desire to prevent others from designing something like it. Creative Commons is an effort to open and help sharing.
Now some businesses will try to lock us into proprietary CAD or CAM softwares, some will try to lock our design into captive cloud services. But efforts like MaslowCNC are about unlocking communities.