The problem is that if you actually read the majority opinion in Raich you'll see that Stevens almost openly said that the court may accept a substantive due process argument in the future (and then we would just have another judge-made liberal law so the libs would have their goal - allowing pot and maybe other drugs without touching the Commerce Clause).
The dwindling spiral we get when we fail to uphold the organization of our government as outlined in the Constitution. We'd be better off as a nation if California dealt with this alone.