Most writers are stellar editors, and editors are great writers. However, if you want content that truly shines, you never want your star writer and final editor to be the same person. Here's why. Stick with me.
Now, I want to tell you about my microwave. My house is mostly put together, but we had an incident a while back where the top-part-thingy (look, I'm not a handywoman--I don't know the technical term) fell off. Since I'm not a handywoman, I did what any sensible person would do.
I taped the top-part-thingy back on. Yes, I taped it back together until I could get it fixed. But, I haven't fixed it. Ever. The tape has become part of my kitchen decor and I don't even notice it.
I bet you have something(s) similar in your house. Maybe it's an orange extension cord running through one of your rooms. Perhaps it's the picture of Elsa your 3-yr-old drew on your wall. Maybe your refrigerator crisper is held together with duct tape.
Whatever it may be--you don't notice it anymore. Even though it's atrocious, it's part of your environment, and your brain skips over it like it's meant to be there. But here's the thing. Your friends notice it. And if they're nice, they'll tell you tape isn't haute couture.
You see where I'm going with this. When your brain is exposed to the same environment over and over, your brain adjusts and accepts things as are. You rarely notice things that are screamingly out of the ordinary--bc it's ordinary to you.
The same thing happens when you write--especially the longer you work on an article. It becomes a part of you. You see the overall narrative--but miss details. So, even if you clearly know the difference between they're/there/their, your brain might miss it.
What you need is someone to come in and say "HOLY CRAP," do you even realize there is an orange extension cord running through your article?!?! Do you?!?! You don't?!?!? Let me take it out for you because it's NOT SUPPOSED TO BE THERE.
When you're building a content team, hire writers AND editors. Make sure they are different people. The last thing you want to do is invite an audience into the Parade of Homes of articles and have them talking about the corner of the couch your dog chewed up.