I do get the frustration on this, but the auto-correct is pretty simple to "correct" in cases where it got over-zealous. I noted this elsewhere in the thread, but my last name is one letter off from that of a fabric and it has on occasion when I wasn't looking or paying attention, it altered my name on airline websites.
This was an annoyance, and for a long time I was just super annoyed with it until I decided "there has to be a way to fix this", and there was. It was a simple double-tap on the trackpad "Learn Spelling", and it was done. I type pretty quickly too, but I'm also pretty persistent in watching what I'm doing and catch the lines as they appear.
I the case of the article, there's an association now on the Mac between the two words, which I'm pretty sure that "Learn spelling" will override. But by default if it hits a word it doesn't know and doesn't know what it could possibly be, it just leaves it as a red line.