Or what?
The rest of us are dumb?
It could have been a good teacher, who found a way to make it make sense, or some other series of positive reinforcement that shaped them and prepared them, to be thinking about mathematics clearly. It doesn't have to be the luck of the draw.
I don't want anyone to give up, thinking they just didn't get the gift, so they should be content with playing with the ball. If you don't get mathematics, you might just haven't had the right circumstances to get it yet.
Whether or not it would have worked to teach it that way in the original circumstances (perhaps there were other things that needed to fall into place first), it's very clear that the right motivation and the right context have a huge impact on people's eagerness to learn and their ability to grok a concept.
Just because most people will never be Olympic medalists doesn't mean they shouldn't play sports and exercise. Lots of people do those things even when they don't have a particular gift.
If you want to be an olympic medalist, you need to work as hard as an olympic medalist.
If you do not want to be an olympic medalist, you do not work more hard than an olympic medalist.
And indeed, if you actually did work as hard as an olympic medalist, you could possibly receive an olympic medal.
Edit: typo
After this I didn't really rely on her help anymore.
I know of a specific technique for teaching algebra - write down the principle used to justify each step in a derivation/solution - that will teach algebra cold but it "costs" too much so we don't do that.
I've heard at least one "officer" ( like dean ) level academic say "We use calculus class to keep the stupid people outta med school."
A 10 year old child who can enjoy them must have some gift that makes it easier for them to understand the difficult parts quickly and get straight to the rewarding part.