The GP also knows that if, for whatever reason, you do get flagged for extra attention, and they then realise you've got encryption capable of plausible deniability, that they will not give one iota of a shit about your protestations that you don't use it.
So you give them the information they need to decrypt your hidden partition of porn and they send you on your way, never realizing you have a second hidden partition full of seditious text.
The important story is that the GMO/hybrids are seeing some selective advantage
But do those advantages have anything to do with genetic modifications? Food crops have been selectively bred for thousands of years. The result of hybridizing a wild strain with a strain that has been carefully cultivated is all but guaranteed to produce something superior to the wild strain. Why assume those advantages are a result of the direct modification of genes rather than plain old unnatural selection?
If all else fails, lower your standards.