Not trying to butter you up, but if I could speak for him I would say you may surprise yourself by the end.
I suspect that exercising good will in the face of endlessly variable forms of human selfishness is in many ways like learning to run marathons. Until you’ve run that distance, it seems like a superhuman effort, but in hindsight you can’t imagine enjoying anything more. You do it because you like it. It becomes its own reward.
I’m just saying I think you’re capable of a more of the good fight than you might give yourself credit for, and we all need to be reminded of this from time to time.
Only if you have stored files locally and select “also delete local data” when deleting the app. You can check this in the Files app or by connecting the device to a computer and browsing the books storage section.
Anything backed by icloud storage (and of course anything purchased from the store) can be redownloaded later.
As a compromise, you can “offload” the app until you’re ready to use it again from the apps section of settings. This has the side effect of retaining existing data while uninstalling the app itself.