Babies skin are very sensitive so the more natural/organic the better. It's just an "advantage" for their skin, but you don't HAVE to get those specific products.
What are the benefits of using natural baby products?
Natural doesn't mean it's good for you .. Remember, Arsenic is chemical element found in a 'natural' state. Doesn't mean it's 'good' for you.
Natural baby products are best for the sensitive skin of baby and they are not harmful.