I only did undergraduate level in Maths, and to me there is a key aesthetic element which makes it created. The choice of axioms to use, the choice of with theorems are interesting.

Yes the "truth" (doesn't exist, see Gödels theorem) is discovered in a vast, wild landscape that Mathematicians explore.

But which areas are worth exploring is a critical question. Partly driven by application, partly aesthetic. It's a quest for simple things that are a bit surprising, or that were hard to make the statements so simple.