There's a life outside the internet.
This was never the point. The article describes how people who have a predisposition to self-harm get an above-average amount of content related to that, which just compounds the negative feelings they may already have and thus possibly accelerate them actually making the step of harming themselves. Respectfully, but you seem very insensitive to the subject matter.
https://en.wikipedia.org/wiki/Copycat_suicide
eg this example of media reporting guidelines that appear to have reduced deaths by suicide: https://www.ncbi.nlm.nih.gov/pubmed/18082110
> In Austria, "Media Guidelines for Reporting on Suicides", have been issued to the media since 1987 as a suicide-preventive experiment. Since then, the aims of the experiment have been to reduce the numbers of suicides and suicide attempts in the Viennese subway and to reduce the overall suicide numbers. After the introduction of the media guidelines, the number of subway suicides and suicide attempts dropped more than 80% within 6 months. Since 1991, suicides plus suicide attempts - but not the number of suicides alone - have slowly and significantly increased. The increase of passenger numbers of the Viennese subway, which have nearly doubled, and the decrease of the overall suicide numbers in Vienna (-40%) and Austria (-33%) since mid 1987 increase the plausibility of the hypothesis, that the Austrian media guidelines have had an impact on suicidal behavior.
If a gambling company sent sales representatives to Gambling Anonymous meetings to offer free bets to recovering addicts, there would rightly be a public outcry and that company would likely be penalised or stripped of their license. I can open an incognito tab right now, visit an online support forum for gambling addiction and almost immediately start seeing advertising for gambling; thanks to ad tracking algorithms, those advertisements will start following me around the internet. That behaviour isn't any less antisocial simply because it's automated and online.
The idea that gambling companies should be allowed to specifically target gambling addicts is not a popular policy position, but it's the default behaviour of online advertising platforms. Personalisation and targeting algorithms are innately amoral; they only reflect the values of a company or a society if they are specifically engineered to do so.
This isn't a binary argument between "the internet should be a lawless free-for-all" or "the internet should be regulated until it resembles network television". It is primarily an argument about corporate social responsibility - companies should not be insulated against the externalities of their business practices. We're never going to completely agree on how social media companies should behave and moderating content at scale is immensely challenging, but that doesn't give them a free pass to ignore the risks and negative effects of their platform.
If the Gambling Association made a bunch of posters about their new lotto and paid anyone who put them up in buildings, and the person running the Gambling Anonymous meeting came and picked up a few to put up during their meetings, do you blame the Gambling Association or the one who picked up the posters?
Ads are currently such a nightmare because almost everyone making money off of them has chosen to go with services that handle everything instead of filtering their ads and hosting them locally because letting those services handle it all pays better. It allows for far more tracking and targeted ads, sometimes for better and sometimes for much worse.