Of course changing an entire country from the (slightly more) dangerous 230 to the much safer 110 should be considered as well...
In reality the plugs and also the voltage don't seem to be major safety issues.
(Also fwiw US plugs are generally TRRs now which do prevent the more common situations.)
Eh. So, both are only dangerous where the electrical installation is defective.
At that point they're differently dangerous. If someone is able to make contact with live (via for instance an exposed wire or defective plug design) then 230V is a bit more dangerous. If the wiring is marginal, then 110V is more dangerous (in that, with reasonable household wiring, it will heat more and is more liable to cause a fire).
Given that I have a modern socket type (BS1363) I'm more comfortable with 230V, as, if there's botched wiring somewhere I can't see, it's somewhat less likely to be fire-hazard-y.
230V on average is enough and if more is needed adding phases is better option.
Thanks, I prefer my kettle to boil in 3 minutes, not 30.
And 110V is still way more than any "non-lethal" voltage.
Considering what the most deaths from the contact with the electricity is the result of doing something extremely stupid - I don't think it would make a noticeable difference. More so, knowing people it would make more deaths, because "it is safer now!".