I'm really hoping it's a case of an out of context edited line just for the trailer. They do that a lot these days, where what's said in the trailers are not the actual lines in the movie. Because yeah, if Clark's father can say "maybe." to that and just turn away, it would be a disgusting butchering of the character.
Or a more practical vision of him.
Jonathan Kent has been trash in almost every media depiction that I can recall.