It’s because a huge amount of business is centered around made up things for going to work.
Things you need to work in an office: suits, dry cleaning for the suits, dress shoes, a car (because public transportation is woefully inadequate for this reason), gas for the car, maintenance for the car, lunch, daycare, a dog walker, you have less time so you are more likely to eat out for dinner, also more likely to hire maids, you are stuck in a commute and radio is awful, so a music subscription, maybe a new phone, and might have to go out for drinks with the coworkers on the way home.
Staying at home, and much of the country on highly limited income, taught us how much we spend on the “privilege” of work. Everyone is still shocked at the emotional and opportunity cost work had, we’re just starting to realize that most of what it sold to us either isn’t real or isn’t needed.
If people don’t go back to work a sea of businesses will fail.