"After Sukkot we celebrate Simchat Torah."
Translation:אחרי סוכות אנחנו חוגגים את שמחת תורה.
Yes, you are correct. But looking at this sentence, it looks to me like the generic we, not specific to some group of men or women. It's like "On the 14th of July we celebrate Bastille day". That is not any specific group of men or group of women.
So for the generic, you use the male plural form.