Entirely true (well, the ratio can prolly differ based on the user), and it's probably why it generally isn't autocorrecting by default. But highlighting and proposing changes does mean that the only errors that should remain are ones where both you and grammarly were wrong, as well as the few where you picked the wrong choice in the multiple-answer quiz that is "keep current vs apply fix".Only thing I will say about grammarly, or any grammar correction tool is; be careful not to rely on it as they make just as many mistakes as people. They miss nuances and change things that don't need changing at times