Yes, they chose their genes and the structure of their brain after all, how irresponsible of them! /s
In general, something that happens at scale and consistently is not an individual problem.
You have whole armies of very well funded designers of things like processed food, or games, working to deliberate find the faults in human brains, and to make politicians make the laws that lets them do it legally, and you say it's the fault of the individual that falls for it?
Do you think people with a gambling addiction are enjoying it and making an informed choice to continue, and could therefore just choose not to do it instead?
But seriously, mental illness exists. Other sorts of things affect the brain - hormones, cancers, dementia, injuries, etc. Some things really are completely out of your control and no amount of "personal responsibility" is gonna get you out of them nor avoid them.
In general, something that happens at scale and consistently is not an individual problem.
You have whole armies of very well funded designers of things like processed food, or games, working to deliberate find the faults in human brains, and to make politicians make the laws that lets them do it legally, and you say it's the fault of the individual that falls for it?