I mean we never see Korra and Asami kiss or say they're dating and the creators confirmed they totally are and people still deny it. Shippers hang on to whatever scrap of denial they can find and nothing short of Dave saying "i romantically love karkat vantas were not just friends" would change their mind.

Which y’know, it shouldn’t matter if your ship is canon or not. Like you can still ship it, it’s totally fine.  I mean, I ship this unholy abomination which will absolutely never ever be canon and it’s absolutely chill. Just because your ship isn’t canon doesn’t mean it’s any less valid or that you can’t ship it anymore (despite what some shipping elitists might tell you).