Schools should teach the students to learn to do the jobs of the assistants and lab technicians ie taking x rays, taking alginate impressions, pouring impressions, pindexing, waxing up crowns, setting denture teeth and flasking them etc. When I waxed my own crowns/brigdes, I was able to see my own mistakes.....my crown preps had irregular margins and didn't have enough occlusal clearance, the 2 abuttment teeth that I preped for a bridge didn't have the same line of draw etc. When the students are taught to do things the hard/traditional ways, it shouldn't be too complicated for them to switch to working with modern equipment. When a person can drive a stick shift transmission, he shouldn't have any problem switching to driving an automatic.
FYI Dental students in 2019 still learn how to take x rays, take alginate impression, pour impressions, Pindexing, final impressions, dentures, master casts, wax teeth, crowns, bridges, prep PFM crowns, all gold crowns, ceramic crowns AND prep for CAD/CAM restorations. I don't think adding an additional tool to their arsenal is a bad idea and it will allow them to work in an office with Cerec directly following graduation. If anything, using cad/cam can improve teaching dentistry because they can see their preps, margins, undercuts, occlusal reductions on the computer and measure/analyze it through the software while sending their work to faculty.