The problem with this quote is twofold:
1. It assumes that inexperience in reporting correlates well across disciplines (i.e. if you read one badly researched physics article, it means the sports pages are similarly bullshit)
2. It assumes the existence of better-informed alternative media
In the particular case Crichton cites, it's entirely reasonable to assume a news outfit might have better reporting on Palestine then on physics, if only because politicians have an incentive to talk to news outfits where scientists might not. In fact, much of journalistic ethics and process revolves around trying to determine political "truth", as much as something like that can exist. Conversely, there are plenty of scientists who can explain the details of the Standard Model or Quantum Field Theory; but don't have a single clue as to how trade negotiations work or why we sided with Saudi Arabia despite them not sharing our values one bit.
Michael Crichton assumes knowledge is an RPG stat and that if a newspaper fails a knowledge roll once we should discard the paper because it's writers didn't put enough points into INT.
Second, most alternative media I've encountered does no better on the "wet streets cause rain" problem. Actually, my experience is that they're more prone to shoddy reporting, because their goal isn't to try and find out something approaching the truth. It's to sell me a series of plausible lies that lead up to their particular political bias.
For example, let's talk about climate science. It's a demonstrable fact that the Earth is warming due to human activity, but there's multiple ways one can be wrong about that. The kind of inaccurate reporting I'd expect to see out of a mainstream outfit would be something like "CO2 causes ozone depletion". A right-wing alternative rag would instead try to deny the science altogether, either by casting FUD on the scientific process or worse. The former is something that might be technically incorrect, but the latter is deliberately trying to convince me that black is white, up is down, and short is long.