I would emphasize that humankind has been deliberately doing mutational breeding. We expose genomes, plant material, to radiation or to chemicals that cause lots of mutations. Then you try to “till” it, as we say, and find something that has better.... But you don't know nearly as much about that, which is mutational breeding, as you would from genetic engineering.
I think you should be aware that some of this is done deliberately to create new diversity for a gene pool that we then select out.