"easy to read labeling to foods with a semaphore: red, yellow, green" Easy to read, OK, but would it actually be reliable? It is way too easy to label avocado

"easy to read labeling to foods with a semaphore: red, yellow, green" Easy to read, OK, but would it actually be reliable? It is way too easy to label avocado red because of high fat content while labeling a candy bar orange because sugar isn't officially considered that dangerous ... and unlike avocado farmers, highly processed food producers have a good lobby.