It's also a common technique among teachers, because teachers are not trying to persuade skeptics. You are presenting it as some kind of manipulation, but it's really just a different audience. And it's a lot easier to read the straightforward style, and learn a lot of stuff quickly.

His conclusions are not really the most important thing about his writing, anyway. He brings forward a lot of good approaches that are an improvement over other common approaches. For instance, he avoids grouping people by a snapshot in time, and instead analyzes them over their lifetime, or even generations.

And he also just asks a lot of interesting questions and dives into the data and finds interesting results.

He's also less US-centric than many writers. Sometimes that alone is enough to advance the conversation by breaking us our of our bubble.