I agree with the OP. It is a given in most car magazines, that they are going to spew out what the owner told them, or they will get there info from wikipedia or some other un-vetted source.
I think where I have had more of an issue with the mis-information, has been Hagerty insurance, when they put out one of their "buying guide" videos together or a similar webpage. How can you say your trying to "help" the car hobby, or your customer base, and then put together a video, that is loosely fact based? or put emphasis on the wrong things when looking to purchase a classic car?
There are MANY knowledgeable people out there to draw information from to put together accurate info for magazines or buyers guides, I just don't think they want to put the time in to get it right, it takes away from their bottom line.