The blog posts are a bit like political or marketing statements. He is selling a positive image to investors or the public using lots of buzzwords or positive language but leaving out or cutting short on negative things. It's not a representative/ fair/ unbiased accord of the current state of the network.

As such the meaning is to impress you as much as possible. You should feel in awe, inspired, positive about SO. And maybe, if you wouldn't know much about the details of SO (and most people on Earth don't), that would actually be the case.

I think he uses community loosely for the content providers and curators of SO (active users) but also for the visitors consuming the stored knowledge on SO. They all would potentially profit from AI if done right. And he certainly also includes the community of Teams users/maintainers, which I don't know much about because there isn't so much overlap with the community platform.

And he seems to be bullish on AI like many others as well currently. He wants to heavily invest in it betting the future of SO. As for the moderators and the community, they are courted a bit in this blog post (although it feels rather hollow given the contrast to reality) because both are needed for that. I personally don't think there is more to "Community equals AI" than that somebody has to produce that training data for the AI. If you guessed who that will be, you understood the blog post.

Whenever you hear someone from "upper management" talk about something, ask yourself who is going to do the work and who is reaping the benefits. That usually tells a clear picture of the message. In this case here the question is if you want to be part of an SO where AI is at the center? Maybe you want, maybe you don't want.