The practical classification seems better than the botanical classification. The botanical definition would also classify peppers, cucumbers, squash, and many other things we consider to be "vegetables" to actually be "fruit".

I think there is a general mental model that works well for diets where fruits are associated with being sweet and vegetables aren't and that vegetables are thought of to be healthier as a result and don't need as much moderation. Though that admittedly falls apart in some instances -- corn, root vegetables, and avocados all need moderated, though two of those are botanically fruit :)