It's crazy how upset this website gets about an inconsiderate coworker breaking them from the "zone" but doing laundry in worktime is the natural order of things.
I can't choose when Janet or John taps me on the shoulder whilst I'm in the middle of something important.
I take breaks when in the office too, I just can't spend that 5 mins putting the washing on. Usually I just look out of the window.
You'd think for once the money people would think about the money, not the method.
If I do laundry and quick groceries in my worktime it's a lot less of an issue if I have to log in to quickly flag an error outside my worktime. Balance is still needed, but that's a world of difference when flexibility goes both ways.
(inconsiderate workers are an issue however you turn it)
Edit to add: Whether I'm at an office or at home, I go on at least one 20 to 30 minute walk and ideally two or three each day. I've been doing that for over a decade. I have no qualms saying that in public. Any employer or manager who sees this as a negative habit because I'm doing it while I'm "on the clock" is not one I have any interest in working for, and I'm very happy if they'll filter themselves out of my set of prospective employers.
If you do computer work, it's important to move your legs and extend your gaze into the distance, often. What you're advocating here and are "startled" that it's "controversial" is just strictly unhealthy. Don't kill yourself for a job. There are many many employers who won't require it of you, because they know that happy healthy employees are more creative and more productive than unhealthy burned out zombies.