This is already possible. Click theshadowcult click "Created Content" click on any thread.
I clicked on your name and then on User "Created Content" now i can see your 4 threads, but i agree that could be on "frontpage" when i clicked on your profile.
You misunderstand. I mention that you can do that in the op. What im asking for is to be able to see all posts in all threads, not just links to the threads you created.