I think the whole forum is geared towards tool use rather than community feedback, or group building.
And well, life is not easy for newcomers. Not to say that there are not lazy people out there, but try to put yourself in the shoes of a newcomer and look for something you need in the 'How do I' section, you'll get what I mean.
I'm still a beginner with the tool and I found the manual to be a pain to read, the tutorials/template are badly labeled and difficult to scroll through when experimenting with the software. They are usually not compatible with each other, can't be pasted together or combined without making horrible problems... the exports are still obscure so testing is difficult. And if i have a specific issue, the search is giving me few hundreds results i need to browse through. There might be plugins I could use but there are so many of them that I would need to keep a notebook just to keep track of what I did install, and what do these thing do.
So yeah, people write posts because that's the most straightforward thing to do. Maybe a FAQ directly on the beginner section of the forum could help?
And regarding less people posting, the separation of complete games and in progress is a great add, now it would be up to everyone here to do goodwill and comment on few devlogs they like every week to propel the community forward!