I think (as someone who has worked on both sides of the fence) this is a classic case of bad elements on both sides causing a lot of stereotyping.
Yes, there are crap PR people who try and flog rubbish stories and tell their clients anything at all in order to relieve them of their cash. Or get their junior people to phone every single magazine to ask if they've read their press release.
there are also lazy journalists who can't be arsed to write their own copy, or who don't have much time to research stories, and tiny local papers or rubbish industry mags who don't have enough staff, who do print press releases in their entirety.
The good PRs I know have longstanding cordial relationships with journalists in their specialist field. The journalists know who to come to to find out about particular clients' activities; they can rely on the PR people to find out and give them the right elements to write a good story. The PR people know that what the good journalists want, their interests, and their preferred ways of working.
Similarly, the PR people can prevent their clients from thinking that they can be in the paper just for existing, and advise them on how to put together a good story. Then they can offer copywriting skills or communication skills which the client may not have on tap in their business.
When it's done well, it's well worth doing. When it's done badly, it leads to the mudslinging you can see on this thread.