Just look around how many kids are properly addicted to screens in some form. It used to be just passive TV, now its extremely interactive, bombastic, supplanting real social interactions. If you don't see a problem and its long term consequences, child psychologists and good parents (and even well-meaning countries) do.
Besides, the "somebody needs to think about the children" meme is getting old.
Ever tried to discuss not having a phone with 16 year old teenager? That's a sure way to to make him/her a target for school bullies. They are still extremely vulnerable to addictive things I've mentioned.
Companies are amoral and are driven by profits and nothing else, some long term considerations are up to society to enforce via regulations down companies' throats. Also seemingly foreign concept to you.