Imho, it was more of a "why bother?". Most of the code is inside Unity, which is harder to access, but they ended up putting more code in the Android part (for

Imho, it was more of a "why bother?". Most of the code is inside Unity, which is harder to access, but they ended up putting more code in the Android part (for the Pokémon Go Plus for example), and probably forgot about it. They can still obfuscate later releases, but the lack of certificate pinning is going to be harder to fix.