It is stupid because it implies that parents have a choice between hugging their kids and giving them drugs. Not that many parents are inclined to give their kids drugs, and some of the best-loved kids end up on drugs. Kids really need discipline more than namby-pamby touchy-feely “be nice to them and they will do whatever you want.” That doesn’t work worth a damn.
No, it implies that some kids turn to drugs to blot the pain of having had too little parental love - and that more of the latter can lead to less likelihood of the former. I don't know why any conservative would object to that (so long as its not presented as the silver bullet to end all drug use, which it never was as far as I know).