This rings untrue. Hacker News is about the most "social media" type of site I use, and I still feel the shift towards isolation others described.

Also, the naive view is to place all the blame for a broad cultural shift on Facebook/Instagram/Twitter/TikTok and pretend people can't choose to limit their use. Someone pretending there can only be a single factor to blame for a problem is usually a biased person with a bone to pick. The rhetoric supports your cause, but the US is not going to ban social media for adults any time soon and telling people they're helpless until the government bans social media is unhelpful at best.