Asking for help and feedback regularly is a must for a designer that is willing to solve the problems. Whether it’s at work with other designers, other cross functional team members, or even the clients(users), there are a lot of people out there willing to have a chat about your design.
Just like how good design can solve many problems, good writing can also solve problems that people face or question. Plus, it provides useful information for people who are eager to learn more about certain topic and even inspire others to push on harder. Most importantly though, writing is actually a huge part of the design process. When I did my internship at Facebook, I spent a lot of time writing/documenting my design process, justifications and to share my thoughts with the cross-functional team members.