Though this thing does not seem remotely repair friendly, the guide looks wrong. There's no need to cut through the mesh and their video (in the same guide) even shows it: https://youtu.be/ArH41WyUt28?t=62

edit: the fact they have to use an ultrasonic cutter next in the video is insane and makes no sense. Is it possible that iFixit is simply missing the correct way to open this?

edit2: Summary of the video concludes that "Even though there looks to be an easy way inside, we failed to decode it. Without a repair manual, your odds of success are slim". Hence the 1/10, which makes sense.