Why is that how it's "supposed" to work? Most couples I know met IRL, and from a close circle (direct friends/coworkers or friends-of-friends at most). I'm not sure I know any couples who were complete strangers before dating.
People tend to use dating websites/apps because they want to find someone _different_. People tend to have friends that are like them, but that is not always what you want in a relationship.
