Here's why:
* Idioms are phrases with a figurative meaning that is different from the literal meaning of the words. For example, "kick the bucket" means to die, but it doesn't literally involve kicking a bucket.
* "I love you honey" has a direct and literal meaning. It simply means that the speaker has strong feelings of love for the person they are addressing.
"Honey" is a term of endearment, often used by couples and close friends. It adds a touch of sweetness and intimacy to the expression of love.