A discussion that explains why it's a bad idea with the person arguing against the idea actually listening to the creator's defense is much better. Quite often people recoil at being told abrasively "that won't work" and end up taking the view that the person calling them out doesn't get it. Whereas a discussion where both sides have a push-and-shove to get to the conclusion sticks in the creator's mind and might even get them to stop pursuing it.
A discussion that explains why it's a bad idea with the person arguing against the idea actually listening to the creator's defense is much better. Quite often people recoil at being told abrasively "that won't work" and end up taking the view that the person calling them out doesn't get it. Whereas a discussion where both sides have a push-and-shove to get to the conclusion sticks in the creator's mind and might even get them to stop pursuing it.