This idea likely has a pre-requisite of this idea:
My thinking: Options to a “announce” a new event are limited to low-value topic posts that create clutter in search etc. Really what those posts are trying to accomplish is to get “new event created” into activity feeds to promote awareness.
Add events to the types of content that show in the feed seems like the way to solve it. Although it likely comes with downstream complications like the idea shared above: you’d want your mindset to be more of a “publishing” mindset like with articles and product updates, which would require the ability to save events as a draft until ready to publish. (vote for that idea above!)