Exactly! And it’s a fantastic example of that type of exercise.
I still sometimes have trouble with criticism on my personal writing, but I never take it personally AT ALL when it is writing for a client. They are paying for it, they get what they want (unless it is irreversibly dumb, very very rare!).
Just as in life when you stop caring about strangers opinions and it allows you to live more freely and happily, it is the same when you’re able to step back and not take criticism so personally, too!