As if often happens, the damage control, in this case control of drugs and precursors, leads to more numerous unpleasant consequences than drugs themselves. Ditto the Quarantine Pandemics...
Meanwhile, recent studies by Lawrence Berkeley National Laboratory hint that toxicity of safrole is similar to risks posed by breathing indoor air or drinking tap water. Its ban citing hepatotoxicity, carcinogenic activity et al. is mainly based on estimations from 1960s works. (MDMA precursor function, on the other hand, has a timeless quality in it and thus another matter. xD)