A total ban on smokable hemp products makes little sense, but the state of California thinks it is necessary.
Bill AB-45 would allow the Department of Health to ban any product that it considers to be a threat to human or animal health without regulation, meaning that anything from hemp oil to other smokable products would be prohibited when unpacked. Health authorities have asked for this provision to be included because it is not difficult to imagine how they would regulate hundreds of other products with such broad definitions.
The main problem is whether AB 45 will introduce and include a ban on cannabis smoking. In particular, the above ban has the effect of allowing smoking products without the FDA's explicit approval. This is unlikely to happen for many, many years, given how the FDA has treated hemp products from the end of 2018 and given the recent vapor crisis that has prompted regulators to impose some kind of ban on smoking products.