https://www.youtube.com/watch?v=74sB68HfzmY

"Be yourself" is indeed poor advice for men. Whether or not you think you are not being "yourself" as you are, "yourself" can be someone different.

Are you skinnyfat or a spooky scary skeleton? You can fix that by making yourself go to the gym. You might not always like doing that, but you will like the results. You can transform yourself into something better.

Maybe "yourself" is not good at music. Practice, and you can become a better musician.