Is the ad hominem necessary? The app offers account-based features, namely cross-platform syncing. Applying "never ascribe to malace what can be more simply as

Is the ad hominem necessary? The app offers account-based features, namely cross-platform syncing. Applying "never ascribe to malace what can be more simply ascribed to incompetence", I expect this is just a bad, baseless rejection. Apple is clearly not going to stop in-app login and registration, so this post is mainly FUD. I can see how App Store rejection can drive a developer to these thoughts though.