Apple does the same thing with iCloud. I had to go through a lot of hoops to get my wife's photos back down locally on the computer.
But it backs up the WHOLE package / folder / whatever terminology they use, including cached and redownloadable data. So if you have a game that has 10GB of cached data, it WILL upload that. Edge for me was >3GB.
And then they have the following user-hostile 'features':
1. They offer a paltry 5GB. Hasn't changed since inception, but app sizes have ... tripped? I have 2GB of health data now.
2. They don't tell you that you're backing up data that can be retrieved elsewhere.
3. The popup when storage is full shows only 'buy more' or ignore (no link/mention to disable individual app like described above)
4. No way to backup to a NAS
5. No way to backup to a computer automatically. You have to provide you passcode every time.As for cached and downloadable data, I have long ago turned off backups for many apps where the data is stored on a server anyways. Backing up these apps never makes any sense.
While it's the app developers that need to make the change, it should be enforced by Apple. After all, that's why there is a walled garden, and that is the premium we pay for when using Apple.
But for Apple to enforce this means less popups on screens telling people that storage is full, which means less sales.
And again, we get to Goodhart's law.