Also the grains are lacking vitamin C and the many other nutrients fruits offer. One could survive on fruit for years but someone eating just bread would drop dead like Fred who ate lead in a tool shed. sry lol... that sentence was falling down hill and couldn't be stopped!
the carbs in fruit are also held in high-water suspension, in other words, fruit is predominantly a high-water food, whereas grains are a very low-water product. fruit is hydrating and passes cleanly through the system, grains are dehydrating and turn to glue in the GI tract.