Yeah it really can’t though. If there’s mercury in the tuna that’s obviously and unequivocally bad. If there’s funny memes supporting the other political party that’s supposed to be equivalent?
It is enough to recognize that at minimum, people disagree about which software things cause harm whereas people overwhelming recognize that lead in food is bad.
Given that reasonable people disagree, it's not even close to comparable.
It may be less acute than mercury poisoning, yes, but social media and the search engine-optimized web encouraging polarization and radicalization in adults, and exacerbating mental illness in children, have been pretty harmful outcomes, not to speak of them being leveraged by state actors with that intention.
We use software to make all kinds of harm preventing and harm causing decisions. Military, medical, social, policing, financial. Pretty much all aspects of life