Wenger? Not in the clip I saw. I think the quote you are referencing was on the day of the game. This one is the day after:
So, the technology is called Piero and Richard says it's not definitive/100% accurate. Listen to Wenger though. I just wasn't aware this wasn't his first reaction to seeing it. That kind of makes it worse in my opinion.
He does understand why VAR couldn't go back/intervene and that there is no real time technology like there is goal line technology though. He wont admit it but he has a chip on his shoulder about City, you can feel the resentment coming through.