SoftBank is that saddad that keeps lending his dirtbag son money, the son blows it all on lotto cards and shit food at Mohegan Sun, and then begs for more money.
Softbank made the vast majority of its profits off a lucky bet on Alibaba back in 2000 (not unlike Yahoo). So using your analogy, saddad got rich off lotto cards and the son is just copying Dad.