The oil contains no gossypol. I suspect the use of cottonseed oil probably dates back to the Egyptians.
And unless I am not understanding the article correctly, selective breeding and crossing was precisely the technique used to develop the gossypol-free seed variety...not gene splicing.
Cotton seed was considered a waste product from the production of cotton until the mid 1800’s. Proctor and Gamble discovered that the oil, when hydrogenated; could be used as a cooking oil.They called it Crisco. David Wesson made a similar product. Eventually, it lost it’s place to soybean oil due to costs and shortages.
This is just another case of industry trying to find a market for its waste.