Additional safety issues:
-wood: severed appendages, damage to lungs when not wearing !@#$%% dust mask while sanding
-sheet metal: cuts, severed or crushed appendages, probably other stuff (I actually met someone who lost most of a finger on the sharp edge of a B-29 bomb bay door he was carrying)
-composites: allergies, other toxicity, lung damage Ever see what happens on a hot day if you don't spread out your epoxy in time?
all: eye damage from flying fragments, ear damage if you get lazy about earplugs, chemical toxicity, asphyxiation if careless and spraying paint inside, fire and explosion from volatile liquids near pilot lights and sparks, making holes in yourself by doing dumb things with tools, getting your clothing caught in rotating machinery
With flammables about, maybe we should all have wood or other static dissipative floors, slightly conductive shoes, big fire extinguishers, etc. They make floor wax that will help with this, also shoe straps, though maybe that's going too far.
Probably lots of other things too. Obviously I don't know what the rates are, but my point is that safety while building is part of the picture as well. The issues involved depend somewhat on the material you pick, and a lot on how you approach your work.
I'm not yet a full scale pilot, but, in the absence of extensive training, I suspect that simple, relatively slow aircraft are safer.