Probably not a bad idea for SoftBank... even this headline is funny, Sotbank has decided against a _ludicrously large_ investment in favor of a _still very large_ one
Considering how much these mega-funds put in, I would wager that 'Investment strategies and research methods' are about selling the vision of WeWork more than anything else. They need the valuation to stay up if they want to divest at a profit.
If you have earlier invested in WeWork as a tech startup then one should be questioning your investment strategies and research methods.