Yes, the assumption that the choice is either (a) a euro-wide IMCR or (b) no IMCR at all anywhere, is fundamentally flawed and totally stupid.
But that is how Europe is working in this instance.
They would probably like to mandate that we all have greasy hair like the Italians, but that would be politically difficult
I do not have any idea whatsoever why national ratings cannot continue. It just seems a pointless piece of political ideology.