“Then you must be supportive of SCOTUS upholding Obamacare, since to strike it down would be selective, rather than all or nothing. After all, it does nothing about federal control of education, the environment, tobacco etc. “
Incorrect, it is a new breach.
I fear that if the feds suddenly stop prosecuting drug crimes, the citizens of each state, who, according to polls, want recreational drugs to remain illegal, will find themselves suddenly unprotected. There are no laws extant on the books, presumably. The people they have elected and the bureaucracies which are entrenched were not elected or appointed with drug policy in mind. Therefore the citizens are vulnerable to policies being implemented with little to no say on their part.
You presume incorrectly.