Seems like a non-issue to me. You’ll go to whichever hospital is closest. If you’re resident in one of the countries you’ll be in EU/EEA and get the usual healthcare for residents of whichever country the hospital is in, if you’re non-EU it’ll depend on what travel insurance you have.
There’s no point looking for logic. These people truly believe granting a licence restricts the rights of people who don’t agree to the licence, which is the exact opposite of what licenses do. It’s blatant misinformation but if you call them out on it (even by quoting their own link) they literally think you’re an astroturfer for AI, because that makes more sense to them than the fact they’re obviously wrong.