Why should I elevate one of their lived experiences (their gender in this case) over all of their other lived experiences? For many topics, experiences attributable to one's gender is all but irrelevant relative to experiences not attributable to gender.
Why not their age? nationality? place of birth? race? sexual orientation? height? native language? myers-briggs personality type? etc., etc.,
I didn't single out gender. All of those other factors are attributes of lived experience. However, restricting yourself to a confined set of those accumulated attributes is likely to yield a restricted view of the world.
Yes, good point! Those are all important as well. I did not intend in my comment to emphasize a binary identity for authors. Seek out books by authors from any lived experience dissimilar from yours to maximize your grasp of our world.
Why not their age? nationality? place of birth? race? sexual orientation? height? native language? myers-briggs personality type? etc., etc.,