The phrase "why not pizza" is used as a catchy and inviting question to encourage choosing pizza as a food option. It plays on the spontaneity and appeal of pizza, making it a go-to choice when hunger strikes. Several businesses and restaurants use this phrase or name for their pizza places to emphasize the easy, tasty, and satisfying option pizza represents. There is no inherent reason against choosing pizza; rather, the phrase "why not pizza" suggests that pizza is a great choice, often implying that it is a fun, delicious, and convenient meal option to consider.
If the question is asking why not to eat pizza in specific contexts or from a health or dietary perspective, please clarify for more detailed information.
