What's stupid about the premise? I like the exploration of how Kid Cable has feelings of being inadequate to be the man he has been told he will end up being while Cyclops feels that he has his missed opportunity to be a good father, it is a good dramatic conflict that enriches the relationship between the two.
It is basically the inverse of the past O5. Kid Cable is not afraid of ending up being his future, he is afraid of not being good enough to be his future. It's a more original idea than usual with these time travel plots.