It's a bit like drivers blaming the road for their accidents.  "Dangerous road", as if the road jumps up and grabs them.   Instead of driving according to the conditions at the time and avoiding any problem as best they can.

Do the best that you can with your children, and love them through any difficulties.

But don't forget, the majority of heroin users are not children, and the small amount that was discovered in this sting is nothing.  Heroin (and worse) is here aplenty.