This is the "chicken-or-egg" problem. As I understand it, analysts rely on financial reporting information to develop their valuation models. But, financial accounting includes many very soft accruals, among those are: (1) estimates on revenue from long-term contracts and estimates of the related costs assocated with those revenues, (2) the allowance for losses on receivables and loans, (3) reserves for contingencies, (4) recorded amonunts for intangibles and goodwill acquired in a business combination and the related subsequent impairment losses, (5) valuations associated with financial hedges and hedged instruments, etc. etc. etc.

As I say to my students, we don't know the company's actual "numbers", we just know what they report. We'll know the actual numbers when they are liquidated. That's when cash accounting "catches-up" with accrual accounting.