Earlier quoted context omitted.
did you mean to contradict the article or did you not even read it? Throughout the Instinctive Drowning Response, drowning people cannot voluntarily control their arm movements. Physiologically, drowning people who are struggling on the surface of the water cannot stop drowning and perform voluntary movements such as waving for help, moving toward a rescuer, or reaching out for a piece of rescue equipment.
I've had water rescue training. I read the article as well. Parent comment was addressing a drowning person victimizing the rescuer, which also seems to contradict the article.
When I imagine a person in the water trying to help it seems obvious that if you're next to them in the water they will clamber on to you and do whatever they can to keep their mouth out of the water to breathe.
When I image holding some object out for them to grab it seems the greater chance is that they wont be aware of the object, or unable to reach the object.
However a rescuer with actual knowledge would be aware of the situation and would ensure they physically touch them with the object so they have to be aware of it.