I think long queues and gaming addictions are not related in anyway shape or form.
If some one stays up 3 days straight playing a video game, it is likely because they have a problem not because of long queues. I will almost guarantee that same person that stayed awake 3 days straight has done so for every expansion launch.
Now I am sure there are people that try to max out game time as long as possible when they get past the queue, but IMO those are individuals showing symptoms of a gaming addition. The long queue time would just be there excuse. They can just as easily wake up earlier to avoid the queue and play shorter sessions.
Long queues are not causing any issues to peoples mental health, FFXIVs dev team, SE, or any other video game company has very little to do with your mental health. In the end this is a video game you are responsible for your own life and you make your own decision. If anything I think it is showing how many people have a gaming addiction.
This thread is as dumb of a subject as do violent games cause violent people. You should be ashamed to try and relate a problem with logging into a video game to mental health issues.