A conduit serves to just check an initial condition with no need for a ‘final pose’ that states require. It can be viewed as a transition that can be 1-1, 1-many or many-1.
The example mentions a ‘killed’ condition and ‘killed how’. Using a conduit ensures that the initial condition is fulfilled before we start checking and transitioning down the ‘how’ route.
If you were to use states to do this you would be checking the ‘killed’ condition in every transition as well as the ‘killed how’. You would also have multiple transition lines going from your previous states to these different death animations causing a lot of clutter.