I think the core problem here is that you view addiction peddling as less of a problem than slow radicalisation. I don't view things in that way. At best they are similarly bad, but to me it seems like addiction is a much bigger societal problem (with a larger slice of people vulnerable to it) and therefore this problem needs to be highlighted the most.

In this context, putting "just" before it can be seen as a way to remove focus from the detail that someone else is focus on to look at the bigger problem. That is what I see here as well.

Your conclusion that it is intentional is too fast. There is a less evil interpretation of real life, and that is that it's not practical for them to implement this in a way that still yields addicted users while avoiding radicalised users. Their money is more important than a problem that a minority is vocal about; it's an unfortunate consequence, but that doesn't make it the intent.