That's not what you said. You said
for a dinky little .10 size engine. Sure, every engine is dangerous, but this is only 2xs the size of the little .049 cox engines we played with when we were 8 years old. We didn't have "experts" around, we just read the directions on the box and went for it. Put it on the boat, start it, keep your fingers out of the way, point the boat away from you, let it go and have a blast. If it works it works, if not it won't be the end of the world.
The only part of it that makes any sense is "keep your fingers out of the way". But, for a beginner, someone that has never been around these engines, what does that mean?
Someone needs to show him/her what "keep your fingers out of the way" means. Even with my expreience, I still cut my finger. Don't generalize or simplify or offer advise on that is, in itself, incorrect, on something that has potential dangers involved.
CGr.