I don't understand that argument. By the same reasoning all drugs should be legal:
Everyone know's it's bad. People get trapped. It has severe consequences for personal health and the society as a whole. But, hey, "it's not impossible to break free from it" by yourself. No need for Government action.
The key metric for me is impact to society. You can do all bad things to you if you want to, and they only impact yourself, but if things have large impact on:
- Social fabric (stability of families and communities)
- Political Culture (erosion of discourse culture)
- Education (lower attention span)
- Healthcare (burnout!)
- Working productivity
It might be a good idea to change the rules to prevent these effects.