This is so true. I try to advocate for this, but even the best of us get caught up focusing on the user that it is easy to forget to look over your shoulder and tap into the experience and expertise of some of our peers in CX, sales, etc. Here is a little case study I wrote up about a really fun experience I had with this similar topic. https://medium.com/macmillan-design/the-3-day-sprint-from-concept-to-customer-af3ddc7e2553