"Chemicals" are a scapegoat. Everything you put in your face is a "chemical". Folks just need to eat food that isn't just a bunch of empty dense calories. Stuff that actually satisfies you.
No one said "chemicals" are bad. The person you're replying to said we should be conscious of which chemicals we put into our body - which is absolutely true.
Agree, but if someone is putting all their effort and focus onto it they are missing the point. If you go out of your way to eat all "organic" and "natural" foods but you're 50 lbs overweight you need to get your priorities straight.