If it is naive the LPs signed off and agree with the strategy.
If it’s not, it differentiates them from competitors. Until you’ve received a 35 page word document from a big public company with bullet point questions (their “standard” catch all set) it’s hard to describe the sheer pain of certain diligence; it can take a team of 6-8 people up to 2-3 weeks to turn something (depending how much you prepared by predicting requests and prepopulating the answers into data room before).
Having worked in financial services, my intuition suggests they are correct. For example once on a buy side engagement helping a client find and acquire bolt-ons (outsourced Corp dev essentially), ran across a company where something didn’t feel right. Did exactly what the Tiny guys did: looked at the bank statements and credit card info and built my own set of financials from scratch in roughly a day. It’s doable.
Now… also had the opposite happen and found some really eyebrow raising stuff over the years. Probably more often than not at least something borderline material shows up if you dig deep and far back enough. The partner at large fund once told me: “No deal is perfect; if you waited for the perfect company you’d never invest.”