Quote Originally Posted by Tim Sweeney
It’s atrocious how Apple vacuums up everybody’s data into iCloud by default, hides the 15+ separate options to turn parts of it off in Settings underneath your name, and forces you to have an unwanted email account. Apple would NEVER allow a third party to ship an app like this.

I spent another hour searching, and there indeed appears to be no way to delete a useless at-icloud-dot-com email account that Apple used to force everyone to take, except for deleting your entire Apple account and losing everything you've bought. Lock-in indeed!