Doing something dangerous or involving risk does not necessarily have the moral weight of committing suicide. Doing something that puts others at risk or in danger does not have the same moral weight of deliberately killing them.
I agree, but the object of the assassin’s act are directed at the end of killing people.
A different example: I would not put the same moral weight on the actions of a magician throwing daggers at targets on a spinning wheel, on which an assistant is tied as I would if the magician was throwing daggers directly at the assistant while they sit stationary only 5 feet away in.
In one, the magician is putting the assistant at risk and in danger, but their death is not certain and not the end the magician is aiming for. Though putting the assistant in this situation involves danger and risk, the magician desires for the assistant to remain unharmed and has taken steps (extensive practice) that aim to ensure the survival of the assistant.
In the other, the magician us just trying to kill the assistant.
With the mother/child situation, I wasn’t trying to say that the certainty of death is the deciding factor, I was just trying to provide an example where I could perceive the possibility of the act potentially being a moral good. In many of the imaginable mother/child situations, I don’t see a moral good or moral evil, but rather tragic choices between moral neutrals.