That option was only added a week ago. Maybe this guy just hasn't played in a while.
You know, what if he decided to quit Among Us for a while, maybe he was bored or he just had something else important to do, and he saw this post about Among Us 2 before he opened the Among Us 1 game. Or maybe he just never hosts rooms so he didn't know about any of the new settings for hosting rooms, because I host rooms very rarely, so I didn't know about this feature too (And I haven't played it for like two weeks, but I have watched some letsplays, and I first found out about this new "Confirm Ejects" only yesterday).