The difference in the 70s, newspapers were independently owned, competitive companies that made not loads of money.

Today is different, papers are struggling, ownership has dramatically consolidated, and reporters are very vulnerable to influence, as their access to future stories and future employment (ie. On the staff of a politician or agency) can be cut off by officials.

It's really obvious at the state level. In the 80s, 30+ reporters covered the NY state Capitol. Now, maybe a half dozen full timers.