Note that for pretty much all other automakers, "training" means something more than a few minutes watching a video. It means actual reading, instruction, and supervised hands-on exercises.
A "new" Ford service technician will have several hundreds of hours of training, and most automakers will further certify technicians so that customers know that the person working on their car actually knows what they're doing.
A "new" Tesla technician might have almost an hour. It's great that they're "starting somewhere" but it sucks for the customers whose service will be fucked up by someone who has no business handling paid, unsupervised service calls.