As a RN, I can tell you that you can get used to wearing a mask to the point where you don't even think about it. It was always part of my job for certain situations, so wearing a mask during Covid was not a big deal for me.
I had not considered that with sand. But I am using paper shreds for the past 2+ years. No dust with paper shreds. Still have to contend with chicken dander, of course.
Probably makes great compost as well.

During Covid craziness, I hardly went anywhere because I did not have to go anywhere. Saved some gas money as well. But I'm an old guy and kind of a hermit, I guess. I only went into town maybe once every 2 months and then late at night or early in the morning when there were fewer people.
Covid only hit 3 people in my extended family. But one died. I was in that age group that was more vulnerable, so I did not mind staying home and avoiding the crowds. I felt sorry for the young people and children. Tough times for lots of people.
Well, you do get enough air wearing a mask, of course, we do it all the time in healthcare, but having a panic attack can leave you short of breath with or without wearing a mask. I'm just glad that we don't have to wear masks anymore for everyday life.
I am a (mostly retired) RN, but at the end of the Covid lockdown in my town, about 95% of the patients with Covid symptoms in our local hospital were people who refused to take the vaccines. Vaccinated people were still getting Covid, but the symptoms were much milder and did not require hospitalization.
At least, if you wear a mask while cleaning out the coop, you can always step outside and take off the mask if you start to feel a panic attack coming on. Wearing a mask to protect your lungs is the better option if you can make it work.