> who could simply choose not to use it

There is an inherently addicting aspect to it though - carefully evolved over the years by optimising for "engagement".

One (imperfect) analogy is gambling - anyone can in theory choose not to gamble, but for some people addiction gets in the way and they don't make the choice that can be good for them. So (in the UK) the gambling industry is regulated in terms of how it advertises and what it needs to provide in terms of helping people stop. I don't know if this particular regulation is in anyway effective, but I do think that some regulation is appropriate.