A bend out of the box is definitely a defect. That's why you get 2 weeks to return the product after you created your click bait YouTube videos and get your money back. No drama!
iPad Pro 2018 are thin products, which is one of the things I love about them. Now I get it that people are thick enough to dumb them in rucksacks with a heavy load and stuff. Laws of physics do apply here (iPad pro are not exempt) Breakable things do break, bendable things do bend. Don't care what YouTube "stars" who generate fortune by targeting Apple products to create the next "Gate" will tell you. MacRumors is not different either. Titles like the one above give them a hell lot of clicks and comments (as it clearly has in this case)