I make typos. Yes, I'm aware of that. And, yes, I copy and paste as I rewrite, and sometimes I don't pick it up.

However, here's the difference. I have been earning a living for many decades as a professional writer. I am not doing it as a result of a lack of knowledge. It has been because I haven't proofed enough.

http://bestebookstories.blogspot.com/2012/09/flattering-words.html

And if people would say something that was true, I would fix it up. I also don't attempt to tell people how to do things when I don't know how to do them myself.