One could say that about a lot of things, which have no legal standing.
A really good copy can be made very good. I once presented a car salesman with an inkjet-printed bankers draft (a scan of the original). A minute later I gave him the real one; he nearly fell off his chair.
CAA inspectors make stuff up as they go along.
And why the original? Law enforcement agencies can check validity instantly.
There is so little first-hand feedback on French and other ramp searches that it is hard to know what to believe.
I carry the original (carefully heat sealed in a food bag) of the CofFC for VAT, and that's about it.