Not everything has to have a use...I think this is the point. Are you suggesting that maths is behind everything else in the world at any given time?

We may study things for their own right, without caring that there is some spectacular real world use at the end. It is upto the applied mathematicians, statisticians, engineers, etc to find the uses in the real world.

It has never been about "needing" a particular bit of pure maths, more the discovery that certain things pure mathematicians have known for a long time became useful in the long run.