"Centrifugal force", while non-existent, is a useful concept.
OTOH, it is subject to drag and lift from the shape of the blade and the airflow around it,so there are other forces acting on it that might cause it to accelerate in one direction or another.
Correct. But, as pointed out above, if the blade is going to hit the fuselage it will do so almost instantaneously, so the time during which those aerodynamic forces can alter its trajectory is very short indeed.