I didn't know if Google is evil, but it is something that has to be considered. There is definitely no reason to trust them, as you are right about marketing departments. They will always try to convince you of what they want you to think about them. It couldn't be assumed Google is using it for intentionally bad purposes, but in the end, even if good is intended, there will be a lot of ethical dilemas, where Google is not qualified to make every distinction. As someone said above, they're not God, and people including CEOs have potential to abuse power. Anyone who desires power, especially in this way, can't be trusted. Look at the hold some kept on people in their country, to creating religion based on themselves, watching people, encouraging spying. They use charisma, or convince others they are innocent. Look at Scientology, which is worse than a confession booth, it uses secrets to subjugate and manipulate. It appeared as if the representative from Google was saying, if you do something bad in their opinion, it will be exposed, and as if they were keeping tabs on that. Whatever Google's purpose, there's unacceptable potential for abuse.
That particular incident was about Facebook, but it can be applied to any company for potential of abuse.
I've always gotten that. John Henry could only temporarily go up against a machine, and AI will always beat us in board games, and can do that all day long, while we sleep or rest for a big part of the day. Some have beaten AI, but very few, they need sleep, and they can't do it regularly, and they probably can't beat it anymore.
Maybe you stumbled on something. When I can't make definite conclusions on assumptions whether something is true, there's no valid reason for Google or any other company to do that. If they weren't using it for intentionally evil purposes (which is now kind of doubtful), they are going to use it for maintaining elitism or for preserving themselves, while good or not inherently bad people don't get protections from harsh realities or evil actors, which would still be evil.
What does anyone make of Google's promotion of opensource? I don't know what to make of that. Kind of like, get its foot in the door, or software freedom?