It happens though. I could share a couple of regular-customer-dies-suddenly stories.
I think you should it could be therapeutic... or depressing. Both are fine.
Back when I worked at a grocery store... within about a one-year span:
A little before official "opening time" one Saturday, one of our regulars appeared at the door. Since I'd
already put the cash-register drawers in, and I knew him, I let him in. I forget if he bought bottled water
or Gatorade, but he took his purchase and went off for his morning jog. The next day, I heard that he'd
had a massive (as in, dead-before-he-hit-the-ground) heart attack on his morning jog....
I was probably the last person he ever spoke to. He was 40-something.
The son of another family that we saw frequently went in for 30-minutes-then-go-home outpatient surgery.
When they gave him the anaesthic, his pulmonary function simply stopped, then his heart. Despite the best
efforts of a bunch of doctors in a damn good hospital, he never woke up. I think he was 16.
These things both kinda freaked me out.