Lets face it a lot of people in the world have arranged marriages and only see their betrothed a few times before they get married and a lot say they are happy with who was chosen for them and are happy. He has not met her in person but at least he/she has chosen for themselves.

It may work. All I know if this was my friend I would be supportive, they are after all an adult and allowed to make their own choices, no matter how odd they seem to the rest of us. Equally you need to be supportive should it work out or go wrong.