I find both "he" and "she" jarring. When there's no reason to use gender, it shouldn't be used.
It makes me think the author either 1.) does not have a strong enough command of the english language to use "they", or 2.) is trying to accomplish something by picking a gender explicitly.
It makes me think the author either 1.) does not have a strong enough command of the english language to use "they", or 2.) is trying to accomplish something by picking a gender explicitly.