Earlier quoted context omitted.
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A ban on desktop PC components over a certain power threshold (300W) or PSUs would definitely affect local AI, and Europe is not a big enough market, nor has it's own internal supply chains to offer alternatives. This has been done in the EU/UK in the past (hoovers/vacuum cleaners) so the mechanism exists. I'm in the UK and support your direction.
And not only. Given your example with 300W, it will affect even things like (somewhat advanced) home servers, (mostly) personal self-hosting machines and even just gaming PCs. That would affect way too much, if I understood your thought correctly.