I agree with almost everything there except the point about powering through and working when sick.
If you are sick (proper sick not just slightly under the weather) then take those sick days. That is what generations of workers before you fought for, so that you wouldn't need to.
On the subject of wfh I do 1 day a week at the office when feeling like it and my productivity usually goes right down to zero on those days. But I like that little bit of social exposure.
I suspect the author was talking more about being just under the weather with this point. There have been plenty of days where I would have called in sick to an office job, but was fine working from home where I could sit in bed with hot drinks, tissues, and access to my own bathroom.
If you are sick (proper sick not just slightly under the weather) then take those sick days. That is what generations of workers before you fought for, so that you wouldn't need to.
On the subject of wfh I do 1 day a week at the office when feeling like it and my productivity usually goes right down to zero on those days. But I like that little bit of social exposure.