The first couple of drawings are terrible, primary school level drawings - the perspective, shading etc. are all completely off.
If you honestly believe you couldn't pull something like that off given 30 minutes of dedicated drawing...well I don't believe you.
Some more examples of skills that are learned:
* Programming
* Public Speaking
* Estimation
* Throwing
* Juggling
Or are you going to start telling me that some babies are born with an innate ability to juggle? or programming?
I am not saying these skills are easy or trivial, they require thousands of hours of dedicated practice. It sounds to me you think most people are simply good at something and do that...when in fact people spend thousands of hours honing and perfecting skills.
You can't jump into the water and start swimming until you lean how to control your body through crawling, standing and lifting...with maths...you may be unable to grasp theorems because you lack basic training in propositional logic (something that is rarely taught before undergraduate unfortunately - it is so simple and provides a grounding that would make any additional mathematics teaching a whole lot easier) - what is your mathematical background? what books have you studied? what lectures/courses have you taken? Lets see if we can't fix this!
Do you honestly think your genetics is playing against you in your study of mathematics? Which bits are you struggling with? What have you tried to fix it? What courses have you taken? Have you tried private tutoring? khan academy? Have you tried anything for longer than a couple of a days? weeks? How many hours of deliberate practice do you think you have put into studying mathematics?
http://www.amusingplanet.com/2011/09/jonathan-hardesty-9-yea... (the original forum thread seems to be down at the moment) - but it chronicles a guy who started to learn to draw and over the course of 9 years you can see the improvement.
I started playing guitar when I was 11...did I suck then...yes...I could barley hold a full sized guitar...and over the years I have learned new techniques and practiced endlessly...and now people would say I am pretty good.
Writing and math are no different - to peg them as just "talent you are born with" deprives the subject of all the work they have done throughout their lives.