Men surely often do. Even women often use “him” when the gender of subject is not known. Through the ages women seem to have accepted these norms whether they like it or not. A customer or an engineer becomes a “him” by default. A receptionist, an assistant, a teacher becomes “her”. “Air Host” is barely even a word [1-5].
I used to regret this as a flaw in the English language  (albeit there are efforts for solving [7-8]). Now I feel that this weakness of the language is a constant reminder of a much bigger problem in the society! We have a long way to go before gender neutrality is achieved .
Let’s start using the pronouns right. An easy way is to use gender-neutral plural pronouns (they, them …) instead of singular ones (her, him, …).