Yes, you need AN office. Meaning, you do need space where you can sit down and work. Does it need to be the same office everyone goes to? Probably for some job

Yes, you need AN office. Meaning, you do need space where you can sit down and work. Does it need to be the same office everyone goes to? Probably for some jobs, but I'd be doubtful of someone trying to claim it is the majority of jobs.