The shoe was on a different foot in Raich. That foot, medical marijuana, is viewed by many with no familiarity with the medical literature as a canard, and a backdoor way of legalizing marijuana. The SCOTUS has since recognized an individual right to arms in Heller, and has since then incorporated it in McDonald.
Except that SCOTUS knew Raich would also take down Stewart, a near identical simultaneous case involving homemade machineguns.