And it completely ignores the pattern we've seen with Hickman's work. He doesn't make throwaway villains / antagonists. His initial set-ups play out through his runs -- i.e. the Bridge and the Council of Reeds in FF. Hickman has said there's also going to be some connection between Avengers and New Avengers, so we'll probably see something of the Gardeners or fallout from them, in NA.
And more characters than not are introduced beating up the heroes out of the blue.
And really? Predicting no other writer is going to use a villain is supposed to be 'proof' villains are jobbers? How long do we have to wait for this 'proof'?