Hi @anon11068467, thanks for taking the time to share your feedback with us!
We already have a thread related to this topic. I’ve gone ahead and merged your thread with [Boards] Make Subtasks become Tasks in board view to consolidate feedback.
We recently launched Subtasks in Board View and I think this would be a great addition to this new feature. I also sent this request to our product team so it can be consider in future updates. Thanks again for sharing!