Explore the importance of challenging assumptions and engaging hard-to-reach users in product design through this JSConf US 2019 talk. Learn how to identify and overcome biases, engage diverse audiences, and create more inclusive tech solutions. Discover insights from real-world projects involving busy mothers raising children with autism and Gen-Z individuals experiencing bullying. Gain practical strategies for incorporating user-driven insights into design decisions and product iterations, ultimately leading to more accessible and valuable solutions for all users.