Technically, many home office workers tend to be in professional sales, field engineers, etc. I've worked from home for different companies since 1997.
Yes, there are side benefits to working from home, and sometimes, that means a down day where you don't have a lot on the calendar and you use that time to catch up with personal business.
That is the trade off for the three nights I'm spending away from home and my family this week.... And the trade off for the business trip to Latin America where I have to leave on a Sunday, and don't get home until the following Saturday.
It is the trade off for the late nights on email or prepping for a big meeting.
So yeah... you have light days, and then the other aspect of home office includes those days you are glued to your desk from early am to evening due to any amount of craziness.
Anyone working from home that averages 1 hour a day isn't going to last long or make what ever measurements they are assessed on... and be fired.