You aren't correct.

> We also played a match that started from the set of opening positions used in the 2016 TCEC world championship, along with a series of additional matches against the most recent development version of Stockfish, and a variant of Stockfish that uses a strong opening book. In all matches, AlphaZero won.

https://deepmind.google/blog/alphazero-shedding-new-light-on...