Your first claim is illogical. THC is an insecticide, yet not a single human has ever died from consuming cannabis. NOTHING is "Good" or "Bad" without proper context.

"Suggest" is not a very convincing word to me. Sounds more like a hypothesis than a conclusion. I highly doubt any ethics board would approve a double-blind clinical trial exploring how much coffee consumption is required to kill a human fetus in utero. Who are these monstrous Danish scientists!?