I know many people love to liberally sprinkle their food with this stuff, but do the Paleo/Primal crowd really need it?

Historically, many cultures used most of these as herbal remedies when people got sick. Otherwise, they didn't really overconsume. All these studies showing improved health in SAD people SHOULD be showing improved results because those inflicted by a SAD are sick. But should herbs and spices still have a place with those who have completely healed their health through Paleo/Primal? Too much of a good thing resulting in negative health effects?