Yes, informative. It's usually someone in your own party, or to oneself, loading or unloading.
I did a fair amount of grouse hunting with the 13 y/o Son this Fall. I went over a good bit of the directions one can shoot should a bird flush. Many get caught up with a flush, swing, and forget about any partners or dogs nearby. One these hunts I usually walked close & somewhat behind to give away most opportunities anyway.
I noticed there were plenty of older, likely experienced hunters involved. It just goes to show one should never let their guard down or think it can't happen to them. A good number of the accidents stemmed from outright carelessness.