why are you obsessed with how other people allocate their money?
I suggest you stop viewing the actions of multi billion dollar multinational corporations as anything similar to individual action.
We should all care how resources are used, even if don't own them. That investment is going to make things more expensive for everyone. See RAM, SSD, and GPU prices.
https://www.reuters.com/business/softbanks-wework-once-most-...
https://companiesmarketcap.com/softbank/earnings/
Either way, seems like enough of their bets work out, so far.
https://blogs.wsj.com/digits/2014/09/19/softbanks-alibaba-al...