The claim is a bit misleading. Pyrethrin is in fact a natural pesticide, derived from chrysanthemums; the pyrethroids are semisynthetic derivatives of pyrethrin and work similarly. Phytoestrogens are a huge class of natural endocrine disruptors, although they are probably not nearly as potent or specific as the ones used for insect control.

It's also worth noting that insects have very different neurochemistry from vertebrates, and some of the neurotoxic pesticides affect receptors that vertebrates don't seem to have at all.