The ironic/funny thing about your comment is that Google Workspace
does have a pretty full featured chat platform, known as Google Chat. And it's clearly not dead (yet), because I just hit it on my account and get a nice pop-up, "Welcome to the new Chat", "Catch up with all your direct messages, group chats, and spaces - all in one place", and then get some walkthroughs on the new features related to the home screen, filters, etc.
But I agree, Google product management for anything but search and ads is such a cluster-f of afterthoughts, side-of-the-desk work, and the impending feeling that it will all get shut down once whatever engineer championed it leaves or is promoted to something else. Also, a huge part of the entrenchment of Slack is all of its programmability and plugins - lots of companies run "ChatOps". I don't see any of that in Google Chat, and even if it were there I think you'd need to be crazy to actually develop a plugin for it before it likely gets shut down or is migrated to something else.