I know the dangers of riding a motorcycle full and well but today I saw a rider down for the first time.
He/she laid down flat on the sidewalk and didn't move the slightest bit as others formed a crowd around him trying to do what they can to help. The bike didn't look too damaged to be honest as it also laid down in the middle of the road. I only managed to get a quick glance because I was on my bus ride home.
My bike is arriving next week and this will be my second season riding, but after seeing what I saw today... How do you prepare yourself for something like that? It's pretty damn traumatizing if you ask me. Especially when people say the 2 types of riders are those that has gone down, and those that hasn't done so yet.
Man... GWS rider...
There's only two things you can do; reduce the risks, and accept whatever risks remain. That's why when someone goes down, people want to know the details so they can figure out if there was a risk they needed to be aware of, or if they were already prepared for whatever it was that caused the crash. No one has been riding so long that they can't learn something new.
The way you came across that incident in your day-to-day activities can be particularly unsettling. You weren't mentally prepared for the sight and only saw the worst of it, without any context or explanation. It should bother you a little bit, but just remember to learn as much as you can about the risks, (unfortunately this was not a learning opportunity) how you can prepare to avoid them, and finally accept the remaining, unforeseen, risk. Otherwise, you probably shouldn't be riding.