Decide what I get to buy where? Sure, that still sucks but at least makes some marginal sense.
But why on earth should they get to confiscate stuff I’ve already paid for once I move countries?
https://www.apple.com/uk/legal/internet-services/itunes/uk/t...
"""
- Purchased Content will generally remain available for you to download, redownload, or otherwise access from Apple. Though it is unlikely, subsequent to your purchase, Content may be removed from the Services and become unavailable for further download or access from Apple (for instance, because Apple loses its right from the Content provider to make it available). To ensure your ability to continue enjoying Content, we encourage you to download all purchased Content to a device in your possession and to back it up.
"""
But that doesn’t mean it makes any sense economically. I’m much less likely to buy a movie (as opposed to renting it) that way, for example.
And redownloading after moving does work for some types of content (e.g. books on Amazon, I believe music for Apple etc.), so it’s really just a matter of a lack of urgency to negotiate this.