You will die eventually, for sure. It's better to have lived an interesting life before one dies (one cannot have an interesting life after one dies because of all the worms). And flying is a good way to make life interesting.
The average time between engine failures is vaguely of the order of 5000 hours, but I am sure that average hides a massive standard deviation - because of the huge range of engines, engine ages, good and bad engine management, and of variable maintenance standards.
It is a good policy to wear a jacket and carry a raft when over water, avoid flying over large amount of terrain (mountains or forests) where there is nowhere to land, avoid flying at night, and avoid flying if the cloudbase is only a few hundred feet above the ground. Do all these things, and one should survive an engine failure.
A lot of people just run out of juice....