Personally, I find this movie riveting. If all you can appreciate is superhero nonsense (and hey, "Guardians II" was fun) or you care what the Kardashians are doing, this may not be the movie for you. If on the other hand its contemporary "Network" resonates, give it a watch. (Or "Spotlight," or "The Post..."") "Half watching" while you do chores probably won't do it, though, pretty dense stuff.
I was 11 when the break-in happened and 13 when Nixon resigned, way too young to comprehend the issues, the "tip of the iceberg" nature of the rot setting in that Watergate represented. In the WP and other responsible journalism, journalists were never supposed to be the story. This filled in what never made the papers, the people (at great personal cost, arguably in personal danger), who broke the story and those whose consciences got the better of them. And of the now familiar vilification of the "MSM..."
Today as an educator I've talked students through the "Apollo 13 was boring, [insert latest Marvel pablum here] rocks." Yes, but Apollo 13 was REAL, it HAPPENED. And the events depicted in "All the President's Men" actually happened, or less "passive voice," these were real people who exhibited real scumbaggery, and real heroism.