What Makes an Effective Data Scientist?

You talk a lot about writing. Well, I guess not just talk, you also put your time and energy where your words are, right? You do a lot of writing. There's a couple of people who are really successful in the tech field that make writing an important part of what they're doing. What makes an effective data scientist? Is it understanding the business domain deeply or is it PhD research level skills,. Python or C++ or Java? And this one thing is transferable across all your AI entire career.