You’re probably confused because you’re speaking quite generally, while most of us here are commenting after reading the article:
> “They came to the conclusion that some of the problems were specific to Instagram, and not social media more broadly. That is especially true concerning so-called social comparison, which is when people assess their own value in relation to the attractiveness, wealth and success of others."
"'Social comparison is worse on Instagram,' states Facebook's deep dive into teen girl body-image issues in 2020, noting that TikTok, a short-video app, is grounded in performance, while users on Snapchat, a rival photo and video-sharing app, are sheltered by jokey filters that 'keep the focus on the face.' In contrast, Instagram focuses heavily on the body and lifestyle."
You can often get past a paywall by plugging the URL to the paywalled article into the wayback machine. In fact, the top comment (at least in my HN reader) is just an archive link to the article.