However, the old ways of looking at marijuana have been completely debunked.
Maybe from a doctor's perspective, but almost all of stigma associated with it is still observed most everywhere you go (stigma likely stemming from "Reefer Madness" which is being proven more and more by the new majority acceptance of the medicine that has come from the Reefer Madness era dying out.
So much so that "concentrates" are becoming more acceptable than traditional marijuana, even though they contain much higher percentages of THC and are more dangerous to make, simply because they're much more odorless to smoke and it's a completely different odor with none of the stigma (meaning it's more likely for a respectable businessman to try/use much like alcohol which is nearly odorless unless you're smelling their breath).
There's actually no reason at this point, why an NBA player can't use marijuana all day long (whether by concentrates, edibles, or tablets) without raising any suspicion, even during games/practices.
This is given the current NBA rules regarding marijuana testing, where players can know WELL ahead of time if they want. The only problem appears to be, some players continue to partake even though they know they're getting tested (though, I assume this is a calculated risk, because they know they have more than enough money to make up for for the suspension, and know the stigma is very slowly decreasing, so it's not a huge blow to their NBA fanbase, which is largely supportive.).