There are those who have and those who have yet to.
That is a truly frightening mindset, sort of like resigning yourself to failure regardless of reality.
For sure accidents can and do happen, however with the right mindset and proper initial training and recurrent training one can narrow the odds and live to a ripe old age without ever having had an accident.
Those who resist recurrent training are cheating themselves of the added value of upgrading their skills level and are more prone to wrecking aircraft.