The underlying issues are far more nuanced than that. In fact, it has little (if any) to do with manual labor competence and/or liability risk; if you can be trained then you can be summarily replaced, and the risk is hardly a support contractor's prerogative to assume.

The root cause of these issues (as I see it) is almost entirely traceable to tech data availability/quality, commercial influence on DFARS data rights language, and the acquisition games being played (of which the general public only every catches superficial wind surrounding ACAT I programs).