Very interesting question. I wouldn't say it's a problem with the approach itself, but i'm not quite sure how effective matchmaking could even become. For the majority of cases, probably very.
Speaking from experience, I can rarely closely associate with people. In the span of 10 years, from a friend perspective, I've kept approximately 8 people around. None of them are from my geographic region, either. If I lived in a large area, it might be different. All of my friends are 'online' friends. We rarely stray from our group of people either, and we all are quite similar. (It's also probably worth mentioning, solely for interests sake, that we all have some form of diagnosed mental illness, which I find quite interesting.)
Speaking from experience, I can rarely closely associate with people. In the span of 10 years, from a friend perspective, I've kept approximately 8 people around. None of them are from my geographic region, either. If I lived in a large area, it might be different. All of my friends are 'online' friends. We rarely stray from our group of people either, and we all are quite similar. (It's also probably worth mentioning, solely for interests sake, that we all have some form of diagnosed mental illness, which I find quite interesting.)