No, it's not foreign to me at all. Let's keep attitude out of this discussion. A heavy plant load does not a cycled aquarium make. It just means the large plant mass can consume the amount of ammonia present. It does not mean that filter media and the tank itself are cycled and covered in biofilm. No matter how you slice it, that's not what it means.
I've read Diana's book for dirt-based aquariums. I've been a hobbyist for 20+ years. Let's not get into petty arguments.
A fishless cycle is not required in a heavily planted tank for some livestock. You said it yourself. That's not what the OP is asking. The OP asked about fishlessly cycling with ammonia. That's why so many of us chimed in with advice.