"And honestly, having a high IQ isn't sufficient for attention to detail, like stirring food."
Part of the problem here is that if you type it all out it sounds horrible. In reality, the world is not as dangerous as an Internet debate can make it sound. Type out the full description of what's involved in walking down the stairs and you'll make an emotionally-appealing for banning them ("my god, any one muscle fails to work and you can fall to your death!"), but it has no correspondence to reality. In my judgment, I am not even remotely endangering my kids in the real world. You are welcome to your opinions, but in my opinion turning my judgment over to others is itself not a good judgment.
"There have also been studies that show that cough medicine may simple have the placebo effect."
Right. Kid goes from a hacking cough that kept him awake for three nights straight to fast asleep (and resumed coughing the next day & night, so "he just got better at the same time" isn't on the table either) and it was all placebo, for a kid who can't even talk yet. Sure.
Honey's an interesting thought which I may consider, except that there's no evidence that cough syrup is a problem, except vague nervousness because there haven't been any "scientific studies" on the topic. However I consider the abundant real-world experience that preceded the hand-wringing about it not being "properly" studied to trump it; on the scale of evidence scientific studies are not the highest good, the real world trumps it (which is actually a core tenant of any decent theory of science, any theory of science missing that isn't worth anything), and it was extremely widely deployed for a long time before some people got nannyish about it. If it were noticably bad, we wouldn't have to theorize, we'd know. (At best it can have a small below-the-noise-floor effect; widespread experience can't prove 0 bad effect but it can and does put a rather low upper bound on it.)
(In fact I'm rather strongly of the opinion that there are numerous real-world examples in the field of medicine and nutrition in which science has "studied" itself into wildly wrong beliefs that nobody would have taken seriously but for the failures in the scientific process and the misapplication of its authority, and as much as I love science and wish I didn't have to do this, I've really deprioritized science in this area.)