There is a legitimate comparison there. There's shared culpability. Sure, you're responsible for what you eat. But those fast food companies hire teams of nutritionists, psychologists, and sociologists, people with PhDs in their fields, and task them with developing the most addictive foods they can. It's no different than cigarettes. Sure we're ultimately responsible for our actions. But it does end up feeling a bit like victim blaming.
I understand the position and the line of thought that leads to the victim blaming idea, but ultimately there is not a "victim". It is not being forced upon the "victim". While it is entirely true the playing field is violently unfair, it is still a choice to participate.
This is why regulation is a good thing. Level the playing field and make it safer for those that choose to partake...but it is ultimately personal accountability, unfortunately.
Yeah it is totally the phone's fault that this person is unable to date other people, that is their biggest problem with smartphones, not the Internet.