Hello teachers,

I have a question about the phrase "play on."

I understand that it is used in sports (to keep on playing) and for music ("let the music play on"), but is it often used metaphorically as well?

Carrie Underwood's song, "Play On," uses the phrase to mean that people should "carrie on with life" (at least from my understanding). Is this kind of metaphorical usage common for this phrase? (I've actually found different songs with the same title, which seem to have a similar meaning)

Here are some lines from the song:
Even though it's the storm on the darkest night
Don't you ever give up the fight
Even when you feel you're all alone
Play on
Play on

Thank you teachers for your help as always.