Well, that's most of the problem right there.
They don't have any personal interest in fantasy as a genre, they're just making it because it's profitable/popular.
By logical deduction, if fantasy didn't exist, then by default sci-fi would be the favored choice because there is no other option.
In my personal opinion, population bases and corporations are trend followers, not trend setters.
So in the above theoretical scenario, they'd become sci-fi proponents because it was "the thing to do".
Mostly it's just pushing my berserk button because whatever they chose to replace Dark Matter with is fantasy and well, given my personal history with decisions like that, I get a fair bit annoyed whenever it happens!
I am wondering though, will SyFy use this experience as a precedent to avoid creator owned franchises?
That is, they only make "original content" not based on an existing franchise so they don't have to share the profits with another corporation who owns the rights.