It didn't just appear, by magic, back in 2020. It began with Daytime TV becoming saturated with GP Panelists. Then the media exploitation of people's concern over their kids' lifestyle choices. Not to forget, the latest Calabraty tittle-tattle.
The Gogglebox replaced Christianity as our Religion. Aided and abetted with DVD Boxsets, then online Streaming. Also Mums becoming interested in the shows their Tiddlers watched.
Hypochondria is Big Business.