There is not a single health-promoting substance present in grains that you can’t also get from vegetables and fruit.
The food you eat either makes you more healthy or less healthy. Those are your options.
Cravings are not about food. Cravings are about stress.
But one thing is certain-in the case of nutrition and health, the science can be confusing and can lead to “paralysis by analysis” (a state in which you take no action because you're not sure what to do).