Where did you read that this is mandatory? It sounds optional to me from the opening sentence of the article.

I can't find anything about mandatory no-office-work in that tweet thread anywhere. I see that the offices are reopening in a few months, with reduced capacity and an expectation that most employees will want to work from home. I don't see anything stating that you will not be allowed back in the office. Maybe I misunderstand. I don't know.