It’s about understanding the bias; if a US news source admits to something that reflects negatively on the US, we can assume it’s at least that bad. Same with a Russian source about Russia.
When an American source runs a story that makes Russia look bad, it’s not very credible. Same with Russian sources on America.
In both cases, the actual narrative the article uses its facts to paint should typically be disregarded; the atomic unit of propaganda being emphasis and all.