Is it necessary to read what you write

I love to write and when I do, it goes pretty quick. When I finish I throw it through a grammar checker, then either return it to my notes or post it. As I general rule, I don’t read it or spend a lot of time editing. I don’t read because I wrote it, I know what I wrote. Fast forward a year or more, I’ll come across something I wrote, read it, and be surprised, or shocked. I guess it’s kind of how I figure out if I got the point across. I’m wondering if others do this and if so, what is your logic behind it?