(for work) I have both "plaigiarised" a policy that I found on the internet, AND written one using as source the ToC of 2-3 other policies, but did the fill-ups all by myself. I learned nothing from copy&paste, I gained plenty from typing it up from scratch myself (even added points that the ToC's were missing).
The clients got the same value (they wanted a v1 policy, and they got one). I became better by doing the work, so next time I had a discussion on the matter I felt that I controlled the discussion instead of pitching in.
Faking it till you make it has the risk that you fake it forever and you become the paradigm of the Peter Principle.
Walking the walk takes more time but always benefits in the long run.
I have met plenty of people though that take the risk to never grow/evolve and stay in their comfort zone because they just want the base salary to fund their hobbies and they get no sense of accomplishment through their work (for many reasons)(I am not getting into this discussion).
Edit:
Ps: I now work like this (when asked to develop a policy for a new client): spend some time thinking of key points (technology changes fast enough in some areas), drop a couple of examples for each bullet point, and then "plagiarise" from previously made work. This way I have prepared part of the downstream Procedures. You would think that a Policy is high (enough) level so it shouldn't need frequent changes, but different clients want different things.