You are mostly correct. But there are definitely common instances where hemp that is strain specific to be low in THC is sprayed with outside sourced thca. I have found this to be the case for most brands I see in texas, unfortunately. That and added synthetic terpenes imo bastardize the legal hemp industry as it is.

It's this exactly that turned me off, especially after a sales person misinformed me that their products where definitely not sprayed with anything, when the flower brand website itself told me otherwise.