Some websites are a marketing ploy for a particular medical facility masquerading as impartial advice. The major problem for the ordinary patient is that the plethora of graphical extravaganzas makes it difficult to tell which category applies to which website. Once an idea has been sown it is difficult to remove it from a patient's mind. Unfortunately, there is a tendency to believe computers. As the software can make assumptions it may not be so obvious what information it is basing its assumptions on.
Books are more transparent.
In a book one gets led from step to step. Software jumps to conclusions. Books are clumsy at making decisions. Software makes the process look deceptively easy. It is easier to know the credibility of a book.