ADDED: re: fitness. I've definitely had to take people down when I've been leading a trip and even had to turn a group around. But so long as you don't push on past where it's safe, it mostly just means people don't get up the mountain. (Of course, it can be a problem with canyons.)
Thats why "guides" exist. And if course it is very safe with a competent guide.
But alpine hiking can be indeed very dangerous, without.
Because Alpine hiking has climbing elements in it.
Add to that a storm and wind and fog - and you have tourists with sandals on slippery rock about to fall very deep. Happens allmost every year.
My experience matches that.
While climbing most deadly accidents (30+% of them [1]) happen because people rappel through the end of the rope (or ropes if using half/twin ropes). Stopper knots are a 10s precaution that is often overlooked.
However, it is true that on easier climbing routes it is easier to hurt yourself because you might hit a ledge on your way down. If that happens it's most likely the belayer's fault because he/she should keep "a tight leash" on the sections just above said ledges. If you let an unexperienced person belay you I assume you evaluated the risk and are ok with that.
[1] https://www.ukclimbing.com/articles/skills/8_common_climbing...
>little injuries sliding down a shallow wall
Those are often not "little" the rocks rip you apart, and when you stop you look not human anymore (a bag of flesh)...happens often at glaciers too.
Not for everyone obviously.
https://en.wikipedia.org/wiki/Via_ferrata
And if without securing...even a bigger objective danger for you to decide if you can do it, that's the point.
I'm not sure I agree about alpine hiking. Most of the failure states I've seen can be avoided by having at least one competent person (out too late, lost, continue in bad weather, etc.) There is still the issue of approving people who aren't fit enough, but you've got a much slower start than diving and you'll probably notice that sort of thing before you're too far in to turn back.
Edit: Possibly you meant more mountaineering-y sorts of trips instead. If you're talking about the sort of thing where you might use protection then I agree with you.