Oh, I didn't make it clear but I don't care for Kaede x Yurika actually. I just kinda see where it's supporters are coming from since I feel there's some logic behind this pairing.
Of course it's not like you don't have a point either but in the end it's something that can't really be proven either way. I don't mind fans having some fun matching up characters, even if the pairings make absolutely no sense whatsoever and even if they are made simply for the sake of matching up all the characters.
The bit about opposites attracting isn't a complete asspull, all animals (including humans) tend to seek out partners which are very different from them genetically in order to create healthy offspring. Standing next to each other doesn't make them an official couple in any way (and for that matter Ichigo and Aoi aren't the least bit official, either), I just said Sunrise does realize there is a fanbase behind that pairing so they are willing to throw them a bone (Kaede is literally the only character Yurika interacts with in the new OP).