It's really tough. I have family members who work in a small distribution facility that ships farm and garden supplies. In order to practice social distancing, the warehouse is running on a skeleton crew of core staff during their busiest time of year, when they would usually bring on seasonal workers. Folks there are mostly glad to be working instead of temporarily laid off, because filing for unemployment is a nightmare right now. Those of us who are able to stay home *and* get paid are privileged.
I chatted with my mail lady (at a distance!) and she feels the precautions our local postal facility is taking are reasonable. It's a rural area, so she doesn't come into direct contact with many people.
I'm going to worry non-stop about any and every worker on the front lines, whatever their role. But I also worry about the economy grinding to a complete halt.