You're bullshitting me if you think I'm gonna prefer to take a pill with "holy basil extract" over a delicious cup of holy basil tea. Absolutely not.
And tell me how to "extract" rooibos? What parts are you going to put into pills? Can you extract the taste? Can you extract the nutrients? Would you make one pill for the antioxidants and another for the vitamin C?
It used to be thought that THC was "the active ingredient" in cannabis. Well, it turns out that THC and CBD, along with numerous other varieties of cannabinoids, interact dynamically in the body, modulating one anothers' effects. Studies have shown that CBD quells the psychosis inducing effects of THC very well. But CBD on its own isn't necessarily a strong antipsychotic. It'd need to be taken in large doses to have that effect.
The idea that "germs cause disease" is a similar misconception. Bacterial infections are symptoms of larger ecological imbalances in the body's microbiome. Sometimes infections are really caused by antibiotics (if you wanna point fingers), as is the case with C. Difficile infections that take hold in guts whose flora have been nuked by antibiotics.