If you believe that do a bit of research on voltage harmonisation, and how many european countries have adopted our 13A sockets and our crap T&E wiring system.
The process is that virtually all electrical standards are written at an international level by IEC Working Groups, then adopted in Europe as ENs, which have to be published in all CENELEC member countries as technicall-identical national implementations. Unfortunately this process hasn't worked for wiring rules, which are subject to national law in a number of European countries and hence can't be standardised, or socket-otlets, where the existing installed base would make it impractical to harmonise them across Europe.
I agree with the gist of your comment though about the so-called "voltage harmonisation", which was a ****-up, done for political reasons
BS 1363, tells manufacturers exactly how to achieve compliance
No, it tells manufacturers what to achieve, and how to verify that achievement. What I meant was that many years ago a standard would (and some still do) specify materials, dimensions, etc. for each part of a product. BS 1363 doesn't do that (other than the dimensions necessary to ensure interchangeability), it specifies some performance issues such as maximum heat rise, breaking capacity, and so on.
Nonsense, the old way encouraged innovation because they had minimum limits but no maximum limits
Wrong, most standards specify, as they always have, minimum performance requirements. There is nothing to stop manufacturers making a 'better' product by exceeding those requirements, provided they meet the tests of the standard.
European standards are best demonstrated by bananas. Some eurow***er decided on the shape of a standard banana.
If you look on the Europa web site you will find that that myth was debunked some years ago.