Disagree with what?
I was saying (or at least trying to say) that even in two-parent families, it is impossible to watch a child 24/7.
Is this what you disagree with?
Are you claiming that you watch your child (ren) 24/7?
Are you saying that you have never turned your eyes away from them when they were outside, even for a half a minute?
(If so, I suspect that your child must be an infant)
Do you pay someone else to watch your child?
Do you think that a child needs more than 30 seconds to eat a cookie they find on the ground?
Don't you think (as I believe) that the fact that your child has never ingested anything that she shouldn't have is, at least in part, due to luck?
Or do you think that parents have complete control?
Do you really believe that life is as simple as that?
Sorry for all the questions; I am just surprised to see a parent saying what I think you might be saying.
I was once with a friend and her son in a market. The friend is an excellent mother, and watches her children like a hawk. Her son - probably about 2.5 or 3 years old - was walking 3 steps in front of her. Someone opened the bulk almonds and spilled them all over the floor. Before anyone could react, her son had pounced and was shoving them into his mouth, directly from the floor. Even though she was watching him, he got the food into his system. Seeing this, I realized deeply that it is not humanly possible to control every second of your child's life, even if you are watching carefully.