I would call those people uninformed. It's completely reasonable for Apple to be hesitant to roll out any new integration features within their own ecosystem in the EU.

iPhone mirroring for example. Seems like practically 100% chance that if they put that out in the EU they'd be facing lawsuits for not making it work with every Android and Kindle and digital pregnancy test on the planet. And making it an open API right out of the gate is a much bigger undertaking than just making it work with your own devices through a proprietary API that you're free to break at any point and just update your devices to work accordingly.