To be honest someone like that should probably be shooting fixed blades anyway due to a lack of educationof what it takes to use mechanical heads properly, and most likely combined with a lack of proper equipment to compliment them as well.

I would have probably agreed with him that "Yep they suck, here shoot this exact model fixed head instead" At least that way you'll know he's at least shooting a decent broadhead and not a $5.00 rusted pack of old Satellites.