How scalable could this possibly be to widespread depression? Critical depression already can lead to intensive hospitalization with frequent daily intervention

How scalable could this possibly be to widespread depression? Critical depression already can lead to intensive hospitalization with frequent daily intervention, so something seems off. Either that preexisting intervention also would have a big success rate, in which case this isn’t news and just isn’t applicable widely due to scale, or else this effect is not due to frequent attention / intervention.