Drug addicts will rationalize their addictions with or without harm reduction. In general, i think its much better to rationalize drug use by taking every precaution to minimize harm rather than rationalizing a drug addiction by saying "I can quit any time, I just don't want to."
For new and casual users, I think the principle is similar. If you have any interest in psychoactive chemicals, I believe you will eventually rationalize drug experimentation somehow. Bluelight might make you start earlier, but I doubt the shift in the "schedule" for lack of a better term will ever amount to the amount of extra damage caused by a lack of any sort of harm reduction system.
I know that I would have ended up experimenting with shit regardless of whether bluelight existed or not. I also probably started earlier than I would have without bluelight. But because of bluelight, I know about CWE, I know about when to call an ambulance, how to get rid of the ER coating, and because of some user input on drug experiences, I know that I can skip certain needlessly risky chemicals that I might have tried without bluelight.