Definitely. Norman Bates is purely fictional. He was created by authors and has appeared in books, movies, and other forms of entertainment to thrill and scare audiences.
In most cases, Norman is not based on a true story. It's more likely a creation of the writer's mind to entertain and engage the audience with an interesting fictional narrative.
He uses unexpected situations for humor. For example, the strange and sudden deaths in the school are presented in a way that has an element of dark humor. It's not the typical way of dealing with such serious topics.
The story seems to be a commentary on the futility and chaos of life. The various disasters that befall the school, like the death of the plants, animals, and even people, show how things can go wrong despite our best efforts. It also might be a critique of educational institutions and their attempts to impose order in a world that is fundamentally disorderly.