I never thought of the possibility that managers might hire contractors to do something that requires a skill that no one in house has, rather than training their staff to do the job. How fascinating! And you're probably correct; I bet that's happened, perhaps more than I realize.
Yep. Jump start and company knowledge and implement a new technology but with a brief to educate the in-house team to take over the solution. That way the in-house team have something to learn from and actively support rather than a disconnected training course or having to learn and implement on the fly.