The article you referenced is specifically about people over the age of thirteen and under eighteen. If you think porn is the main or a major part of the toxicity of online culture for that age group, then you're objecting to people with maturing and mature genitals, genitals that menstruate and ejaculate and cause orgasm when masturbated, sometimes being able to see pictures of genitals despite not being allowed to see pictures of genitals. This is puritanical nonsense.