Stress is something that is hard to quantify, especially because different people experience stress in different ways, and have varying responses to it.
For me, I’d definitely not want to be a police officer during this time. Even before the protests and the Covid, it’s stressful now anyway with departments’ guidelines, etc. I guess like any job, it might depend on where you work and in what capacity. A job in NYC is going to be different than a job in Mayberry, USA. A job in a tourist area like Orlando or Daytona or Myrtle Beach is going to be different than a job in a little town off the beaten path.
I’d not want to work in any type of customer service job, getting cursed at, made fun of, belittled. Some people do that and take it with a grain of salt. Especially because they often work for minimum or very low wage with poor benefits.
Any type of Child Welfare job can be very stressful. I can tell you that from experience. My bet is that Probation Officer would be just as stressful. The wages and bennies for both of these jobs might or should be good, though.
You could have a great job but if you have an awful supervisor that you can’t stand, that would be very stressful, too.