I can't disagree.  

I sample all the local news stations and their national versions as well on an irregular basis.  Covering exactly the same story can result in such different 'news'.    

I discovered today on ABC National news that women who travel to places where Zika is prevalent need to avoid sex for 8 weeks, now, instead of 4 weeks.  

3 minutes later NBC National news confirmed that information and also said men should avoid sex for four  months, something ABC omitted. 

Single news sources are not a good thing, no matter what the media or the news topics.  Even without bias (Right!), material information disappears.