Rifled slugs were designed for smooth bore to impart spin. They work just fine in my rifled barrel. No different than shooting cast lead bullets in a revolver or muzzle loader.
I have found sabot slugs to be more accurate than rifled slugs. But rifled slugs are still accurate enough for deer at 100 yards or less. With some sabot rounds in my TC encore the range can be extended to 200 yards for deer.
You can't fix stupid....however ignorance can be cured through education!