What does it mean that cheek volume is important for nasolabial fold fillers?

It's not just about fulfilling one's fate.

I've heard a lot of people say that you need to look at the hollowness of the cheeks and the volume of the mid-face together to get a natural look.

After just filling my life for nothing
I'm confused because there are cases where people said I looked awkward when I smiled.

Ultimately, I wonder if the overall balance of the face is more important for this procedure.