Anna is based on a home worker with no dedicated workspace who instead opts to work from bed
I mean, if I'd been working 5 days a week from my bed for the last three years then I think I'd probably be pretty fucked up by now. The article doesn't purport to be every home worker, it says it's about people who work without the right office equipment.
I work a few days a week from home now, but I'm fortunate to have a spare room with a good desk, a full-sized chair with lumbar support, natural lighting, etc. Not everyone has that. When my office first reopened, the first people to return were often the recent graduates who lived in cramped flatshares with overburdened shared WiFi, who had been either working from their beds or sharing a kitchen table - working from home had not always been a fun experience for them. The people most reluctant to return were those in their 30s and 40s who could afford the full home office setup (as well as who might not have felt they got the same benefit from having experienced colleagues around to learn from, given where they were in their careers).