You can literally become president of the US by accident these days. SBF self-reported to a random journalist one day after all hell broke lose with messages so incriminating the reporter had to confirm that it was a real conversation.
Half of the American elite class voluntarily sat on the board of a bogus company just because the woman running it was attractive and wore black turtlenecks. The sad reality is that these people aren't ruthless operators, they're just marginally less clueless than the people who got them into their positions
Who became president by accident? You may not like them personally or their politics , but I am not aware of any president that didn't put enormous amounts of work and effort over years into becoming president.