@feruze-- I can't say anything about your comment on genetic modification. I haven't heard much about that.
But soybean oil is very healthy. Or maybe I should say that it's less harmful than all other oils used in foods. In one teaspoon of soybean oil, there is 40 calories and 4.5 grams of fat. In one teaspoon of olive oil, there is 119 calories and 13.5 grams of fat! In vegetable oil, that's 120 calories and 13.6 grams of fat! That is a huge difference!
Plus, you won't really want to use soybean oil for frying or cooking since it has a low smoke point. And the amount you need for flavoring and dressing is not much. I don't think there could be much harm in that. And you would be cutting out so many unneeded calories from your diet!