AI is superhuman at reading and understanding assembly, it doesn't care much about if it's decompiled or has symbols, that just makes it a bit slower. In some cases it can even understand heavily obfuscated control flow directly without using tools.
That's not true, they did do obfuscation but the main sneaky thing they did was to make hackers think that they had found all of the checks, and then hide checks that would only trigger half way through the game. That kind of obfuscation is also not relevant to security vulnerabilities.
AI is already superhuman at reading and understanding assembly and decompilation output, especially for obfuscated binaries. I have tried giving the same binary with and without heavy control flow obfuscation to the same model, and it was able to understand the obfuscated one just fine.