How could Google possibly choose not to use +1's if they use Facebook and Twitter data as ranking signals? Reference: https://www.youtube.com/watch?v=ofhwPC-5U

How could Google possibly choose not to use +1's if they use Facebook and Twitter data as ranking signals? Reference: https://www.youtube.com/watch?v=ofhwPC-5Ub4 https://www.youtube.com/watch?v=ofhwPC-5Ub4