What do you mean? Why did they die because of aluminum wiring in the house?
It is like any technology that delivers “power”. If there is a problem with the technology either wear, bad products, etc...there are consequences.
Aluminum over time weakens because of the expansion and contraction within the metal when current is flowing through it. Over time it can crack and create a situation with spark, shorts, etc...depending on the installation, etc it has cause home fires.
Our house burned down due to aluminum wiring. What happens is a wire running horizontal, over time and many heat/cool cycles, the aluminum and Bauxite begin to separate inside the wire. Then the resistance gets so high it overheats the wire and burns whatever is around it. There goes the house.