Personally, I use the main site just to scan headlines and see if there's anything interesting.
Everyone's biased, but I don't think I'm more of an objective thinker than a trained journalist who's taken classes to study it and write about it specifically. I don't believe many people can spot bias as well as they think they can just from a reporter's writing.
And yeah, they aren't experts at everything they cover. It's not a scientific journal. They should use sources for that stuff and if they don't, you should move on. Remember they also don't write specifically for experts so details get left out.