SoftBank and Masayoshi Son's hypothesis is:
1. Find a market which can be captured by a business with access to massive capital
2. Provide massive capital
3. Extract profits once a monopoly has been established
WeWork is a terrible example of this, because in no way does scale give them unique advantages. And furthermore, "scale" in this context means "scale in the office property market" -- that's a pretty big pool to expect to overflow.