A mathematician can see beauty in their equations. They can strategically move and manipulate factors in their problems, and adjust their expectations to the results, and then rework the same equation from various points to find out precisely why their results didn't meet their expectations, and how it might be possible another way. A mathematician can see in their mind's eye exactly how the objects represented by their variables interact as they solve the equation.
Is mathematics NOT creative?
A painter can be sat in an empty room given the primary colors along with black and white, various brushes and pallet, and create a truly awful painting of a vase and flowers on the canvas.
Place a vase and flowers before them, however, and their keen observations allow them to recreate the image exactly in remarkable detail, even embellishing and tweaking colors and shadows some to perfect the image, and balance it perfectly in the confines of the frame.
Is this, "artist, creative?
If we challenge the definitions of creativity and art we've had shoved down our throats in the same formative years you've been malingering over, we realize that there is immense creativity in things we thought were mere mundanity.
Anyone who can LIE to you is capable of writing a good story. They tell them all the time, why not write it?
Anyone who can write by hand can learn to draw a picture of what's before them.
A physicist can create sculpture with mixed metals and high explosives.
I will accept that some of us have greater innate talents in some areas of creativity than others, but to say creativity can't be learned is to ignore the connections between the seemingly mundane things like reading and writing- the conversion of emotions to complex concepts, to audible symbols, then to visual symbols, then back again- and the things we stereotypically consider creativity.
They say the separation between man and animal is that man uses tools. Then of course there's someone who points to a chimp fishing termites out of hill with a stick saying, "but isn't that a tool?"
The real separation is that man can imagine a tool they want, realize they don't have a tool to build it, then make a tool to make the tool to make the tool they wanted. Is that not creative?
The single greatest ability of humanity is its creativity. The least among us has more creative potential than most creative of animals, and is able to to learn to apply it in some fashion.
Next time you watch someone bust out a complex equation, don't say to yourself, "I'm not smart enough to do that." Say to yourself, "I'm not creative enough to do that," and see how it feels.