Ah, so you have a vested interest in the wrong conclusion. That's twice as wrong.

The harm comes in propogating an illusion.

If there were no PHS, and if you had a '67 with a date correct and code correct engine and the seller told you it was the original engine, your choices would be to believe it or disbelieve it.

With PHS, we have engine unit numbers. Proof that it is (or was an accurate forgery) or was not.

Propogating an untruth is not good for anyone. Especially with the kind of $$ a Ram Air commands.