That's a very common quote. Everyone knows it, even a kid knows it.
Everyone have the power to frame what they see.

But do they have the sense or do they able to capture what they visualize before they frame a scene?

Indeed, it takes long time.
But don't just practice.. try to understand the element, theory side too. Being too technical without your own touch can be quite fatal too be honest.
If you're interested to get into this kind of work, go and knock any photo studio or photo agency.. you're willing to be assistant or intern for a month or 2.
Learn a few stuff, business side, dealing with the client and also observe how photographer do their work and also how photographer discuss with his/her own retoucher team or is the photographer do themself, observe again how they do the flow. That's the fastest way to understand.

I'm in this field for almost 10 years. It takes 5 years for me to finally understand the whole aspect.
As long you still have the fire in you onwards... just don't give up because it is a very competitive industry. Keep on doing...