Advocates for clear, plain English recommend using the second person and not to shy away from imperatives. [0] It makes it easier to use the active voice as well as use less words. As a reader of this article, I don't take issue because I understand that the author isn't actually commanding me personally to do these things. It's just a sentence structure that conveys the information in a more readable way.

I wonder what life expectancy is when you're already 40. It has to be quite a bit more than the expectancy at birth, especially if you only count richer countries.

Thanks! That's really reassuring and will definitely help my nights! :-D