I used to spend most of my time building because like many founders, product work always felt like the most natural and rewarding part of the journey for me. Shipping new features felt productive, fixing bugs felt like real progress, and improving the user experience gave me the feeling that I was constantly making the product better and moving closer to success. Marketing, on the other hand, always felt much messier and harder to measure, so without realizing it, I kept pushing it aside and...