I received several full ride offers to college. But it was because I worked my ass off. I was only modestly talented.
The quip "The world needs ditch diggers" can easily be extended to "The world needs moderately talented ditch diggers". No one stands on their own shoulders, and even the best of those math whiz's will need someone who can understand most of what they say and can check their math, or do some more mediocre work of their own that helps out the "smarter" person.
To put it in a car analogy, it doesn't matter how great your engine is if there aren't wheels to go along with it.
To put it in a programming analogy, the lead developer/architect will always need someone to implement dwim().
Even if you can't be great[1], you can still be good, and most times that's good enough.
[1] I question that assumption; introspection is an incredibly useful quality that a lot of people, even seemingly-smart people, lack. You appear to do a lot of it, so you can probably go further than you can imagine right now.