Often I feel (*cough* KNOW *cough*) as if there are people who vastly, vastly outperform and there's a sort of existential "What's the use?"-moment.
The Law of Comparative Advantage is useful for such moments. I'm nowhere near being a competent mathematician, but there are still opportunities.
The other thing that I find encouraging is that mathematics is not an ever expanding sphere where the discoveries take place at the edge.
It's more like swiss cheese: there are little holes left all around to fill in.