Magnus said something like that about CCC, the Computer Chess Championship. Engines, especially alpha-beta algorithms play in a very mechanistic way, totally unnatural. Granted ML algorithms are more human-like than alpha-beta, but even then their playing style is strange nevertheless.

They are great tools to use, but smart? I don't think so.

Edit-- I cannot find the source, but Magnus said that he doesn't personally look at computer games, (because they are garbage), not that the games by themselves are useless. They put one engine to play against another to test openings and positions. That's useful. It is that Magnus and most of other people, have no interest in watching games by engines.