"Weed is bad" is not what I am arguing against and therefore a generic "video games are bad" complaint is not equivalent. The question is whether we should care that weed makes you a less productive member of society. Loot boxes have no impact on a gamers level of production so it is an irrelevant argument.

Also isn't the "video games rotting people's brain" complaint always laughed at in circles like HN? Is that really the parallel you want to make? Plus people generally only say that in relation to kids. I'm not advocating for kids (or anyone) to use pot. I am saying the personal productivity angle is a weak line of argument and is usually masking some other objection to pot since the same argument is not used in other discussions in which it is equally applicable.