Here's where we agree! I'd love better discoverability built in to these products. It'd be a huge boon, personally, at my workplace (that uses Confluence :-().
That's where Roam Research has a point. Creating a graph is appealing, as it is easier to browse and so discover things. That's also how Wikipedia works. But Wikipedia would never have worked without Google.
In organizations the best thing to do imo is to have everyone follow the same rules. Even bad rules that everyone follow is better than everyone following its own rules. And that's clearly one thing that Confluence sucks at. But the rules can't either be the same for anyone anywhere, so there is some balance to find. The other area that can help discoverability is curation
I would be happy to have a chat with you, don't hesitate to reach out to paul at dokkument com