Not sure of your background - I recommend trying to find the answer for yourself. Here is a blog post on the subject: https://medium.com/@revelutions/silent-blog-post-on-software-test-automation-ec2fe53ceb41

The idea is that once you put a test automation script in Git, all it does is it detects change (which is important). In contrast, testing is the back and forth of asking questions and exploring software and performing experiments to find what might go wrong (risk).

I also realize that in the current software development environment it is very difficult to convince people of this.