When people ask me if I am ever afraid of flying I always reply yes...when I fly an aircraft that has just come out of maintenance. I don't disagree that there are a lot of things that can bring an aircraft down but there are very few completely random events that haven't occurred before that result in a sudden dive to the ground. I am not throwing yet another pilot under the bus but deliberate action of the pilot cannot be immediately discarded because society doesn't know how to deal with it.
Have a read of this article and you might see that it is not just a "blame the pilot" mentality:
https://www.ainonline.com/aviation-n...health-paradox
In your scenario of the throttle cable, a sudden application of full power without any corresponding control input would lead to the nose pitching up and would result in a vary different descent profile i.e. the aircraft would probably enter a stall at full power with a sudden wing drop.