"Geography" would be more valid if this was about rock formations or trade routes.
If someone says "when it comes to building codes, the UK is no longer in Europe", then everyone knows exactly what is meant. Performative misunderstanding isn't helpful.
The UK is in Europe.
The fact that we know what they mean by saying the UK is no longer in Europe does not make that statement any more correct.
I often see comments from people outside of Europe who think that the UK "left Europe" (not realising the distinction between Europe and the EU). I don't blame them, but I think it's worth pointing out.
Respectfully, I disagree that they are not realising that. They are just using language differently, i.e. "Europe" in a political / legislative context can mean "the EU", i.e. a political / legislative boundary not a geographic one.
You can say" they're wrong" if you like, but use of language is more commonly viewed as descriptive not prescriptive: "how language is actually being written and spoken rather than trying to identify a correct way"
tl;DR People know what they're saying and you understand it, so what's the issue? what I said in the 1st comment.
People can work around a lot of mistakes, it doesn't mean it's correct. If I tell you my brother speaks Mexican, you know very well I mean Spanish. Does that mean I shouldn't be corrected?