But I don’t get how this is propaganda. It’s not suggesting that people RTO, it’s saying they should not work in bed because it will hurt their sleep. The whole “RTO” part of this was spin put on it by the submitter. So, I guess, on second thought, maybe you are right.
Why I think it probably is a form of propaganda, is purely because the headline says Working from home is causing it. If they didn't want to front-load a negative view of WFH the headline would be "Working from bed unhealthy" or similar.