The arbitrariness of app store review hasn't been the greatest on the Google side, for me lately anyway. I got dinged for having an E-rating for my TV show info app that displays an official promo image for an episode of Landman, where a character has a wound with some blood on his face.

I pointed out that there were a couple other E-rated apps that show the exact same image, and many more T-rated ones that only warn of "In-App Purchases" — no "Violence" label. One of the latter is the official Google TV app [0], so I sent some screenshots of that, and asked if maybe they were "crushing the competition" by avoiding their own review process, to see if that would escalate my case (no such luck).

[0] The image is still the same in the Google TV app, and Google Search surfaces the image in question S1 E10: https://www.google.com/search?q=landman+season+1