Absolute horseshit, bud. By your premise, journalists would never get a story.
Contacts are developed over many years, usually when people were still working up the ladder.
Aside from legal documents, steers, briefs or leaks happen in every facet of everyday society.
My cousin runs a hedge fund and secured £400m in the Emirates last month, he knows what he tells me is of interest for me, won't piss on his own chips.
I knew the Chief Constable of Greater Manchester had been dead ten hours before it was announced, simply because of the huge chain of departments across the Force.
Worsley Web on here will share commercially sensitive info re City stadium plans because he works in the industry.