It's not a bad choice for one to have cereal as dinner once in a while, not always, though. Cereal is one of the fastest and sweetest meals to have for the family, and kinda affordable and quick to prepare for the family.
I remember when I was growing up at a young age, cereal foods were what my parents liked preparing for me to have as dinner. I was adding in weight because of that, due to the plenty of milk added to the cereal for me to take. Now that have grown old, I don't fancy taking cereal as a meal to avoid diabetes in old age