In this context, Chrome is just a browser, just like Safari is on iOS. The "problem" is less-technically-savvy folks (especially -- and ironically -- tech native youth) don't understand/care about the distinction between Apps vs a Website Bookmark/Shortcut.

That Patreon is even considering keeping the app is proof of this.

Depending on how overt Patreon's app is about ringing the alarm bells (imagine a "JUST MAKE A SHORTCUT and save 30% on everything!!!" popup) would just get them banned too, no doubt. Presumably criticizing Apple is a bannable offense.