Not just bandits - Taliban Muslim bandits.
The other clarification you need is your statement that missionaries are fatalists and act with hubris. That is your own BIAS being projected onto the victims’ motivations.
Their motivation was to travel in a large group, with no security what so ever, into a remote area full of hating and armed people.
Now they are all dead instead of treating sick people.
Their dreaminess is now their families nightmare.
My bias is to see highly skilled doctors treat the sick, nothing more.