Earlier quoted context omitted.
Yes it's a mistake exactly in the eyes of those who know the meaning of the word. "com" + "prise" = "grasp together". An error can be more common than the correct usage and still be an error. Would you accept "A table setting is included of plate, fork, knife and spoon." as correct usage? What if "included" becomes rarely used in the future and this incorrect usage becomes relatively popular? Would that make it corre…
> "com" + "prise" = "grasp together". This is a terrible argument first because etymology is not meaning, but more importantly because "grasp together" doesn't seem to rule out the errant meaning. "This table setting grasps together a plate, a cup, and several pieces of silverware." seems if anything less wrong than "A plate, a cup, and several pieces of flatware grasp together this table setting."
Well, ok, but we are not criticizing use of "comprise" but of "comprised of".
This table setting grasps together [three things].
This table setting comprises three things.
This table setting [together grasps] three things.
These are all correct.
*This table setting is grasped of a plate, cup, and flatware.
*This table setting is comprised of a plate, cup and flatware.
*This is grasped-together of a plate, cup, and flatware.
These are all wrong, for the same reason (so it can't be the Oxford comma).
If you wouldn't say it out loud with "comprised of" replaced by "included of", then it's wrong. That's the simple rule.
The backwards version is "The plate, cup, and flatware is comprised of the place setting" means "The plate, cup, and flatware is the total-grasping-together of the place setting."
It becomes clear if you write it this way how awkward it is, and the preposition clearly seems like the wrong one, so this is why the standard advice is just to avoid this confused, clunky phrasing.