The security risk is also less of a problem in a mostly rational society, which is what we have had for a long time. You'll get lone wolves, but finding a group of people so angry with a politician they're willing to conspire to kill them? Very, very rare. Violence is a last resort for people who feel totally powerless. So, in a dark way, easy access keeps politicians from pissing off their constituents too much.

Which is why the stream of "fraudulent election" lies is so dangerous. A person in a position that confers trust is telling people the government is openly defying them. For people who believe that, violence is the only logical way to affect politics.