why do we say "she" referring to a general user of a program [closed]

Solution 1:

It is something, in the U.S., that has developed as a result of "Political Correctness." Previously, the pronoun "he" was used nearly exclusively (barring the use of "they").

Solution 2:

Because using "he" all the time is sometimes considered sexist. Since we don't have a gender-neutral word to use, sometimes people use "she" or just alternate the two in their writing.