Imagine that people have been breeding animals and plants for thousands and thousands of years, and still anybody is free to do what they want with them.
Getting two animals to fuck and genetically engineering a plant in the lab are… not quite comparable in required levels of effort. Even then, if you want semen from a Kentucky Derby-winning thoroughbred to try and build off those genes, it'll cost you. Or a purebred dog.
No one's putting in decades of R&D into something like this if they can only sell a few thousand for a single year before the big nurseries take over.