I've never met anyone in my life who vacuums at that rate. Not sure if your personal germophobia counts as a counterpoint.
People that don't vacuum that frequently, I'd assume, are also the type of people that don't clean a litter box for a week instead of daily.
I would not personally vacuum daily but having completely automated, vacuuming and mopping, every day has produced wonderful floors. Less work than what we did before too.
There's no germs involved here. Dustin on the floor is dirty socks, and you can peel crumbs and other things under foot under foot. It all goes away if floors are cleaned daily.
We also have building ventilation that is sadly unfiltered, so we have more dust than normal coming in.
We don't vacuum everything daily but a robot would really help us, we just won't buy an internet connected one or something that's very pricey. Our existing vacuum is crazy efficient and quiet.
Some people install domotic, always choose escalators and elevators over stairs, do everything they need to not move their ass during the day only to pay for a gym pass and spend more time at the gym than they have provably saved avoiding "living".