You mean modern Buddhists aren't. Early Muslims considered the Buddhists they encountered as "people of the book."
Source: https://www.shs-conferences.org/articles/shsconf/pdf/2018/14...
Given the context, he probably meant they aren't "by the book", not strict about their scripture.
Buddha became more God-like as the centuries passed; some Prajnaparamita and later texts describe him as being the height of seven palm trees, for example. But he's never been considered infallible, like a prophet.
That's exactly his selling point, that through deep meditation he had profound insights, regarding impermanance and no-self. But yeah, that was his own realisation, not just some words some god said to him that are supposed to be infallible.
Would love to know more ...
Religions start with key important figures, events and practices long before they get encoded as text. The only one I can think of off the top of my head that might have gone somewhat in the reverse direction was L. Ron Hubbard writing Dianetics and other books to develop a schema and theory for psychological healing before he officially started Scientology. But I don't know all the details about early Scientology so it's hard to say precisely how much was pre-encoded there. I've heard rumours that Hubbard was involved in Freemasonry before starting Scientology so if it's true, it's likely that some of his experiences in it shaped his writings. I also heard that Paul Twitchell, founder of a lesser-known group called "Eckankar" spent some of his earlier days in Scientology. But I digress.
When you strip practices away from dogma in an attempt to further enrich corporations, it's almost like trying to start over with the practices borrowed from some past heritage, the corporation's leadership as the key figures who give advice or select practice consultants to confer with, and with some milestone of success as the promised "awakening event". It definitely runs the risk of turning the corporation into a personality cult where your boss directly or indirectly tells you how to reach a spiritual objective... Of making them money.