Creating a huge list of tasks is actually what I would call an Agile anti-pattern. It's something that I unfortunately see all the time. User stories are meant to be written from a business or end-user perspective. It's a high level description of what is to be done, for who, and why, not how. I personally don't even like having tasks on the board, just give me a well written story and I'm happy to complete it based on what's written in the acceptance criteria.