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The simple answer is: Money.

If you're making money in the UK, they have a lot of legal authority over you.

If you're based in the UK, they have a lot of legal authority over you.

If you're neither of those things, they might complain, but the actual consequences are close to nil.

And they're not banning the tools (this is arguable, but they "can't" logically, as you point out). They're banning businesses from providing the tools.