If I coded so much as a comma in the Bitcoin Client, the whole system would crash and fall apart. Coding is just one of the millions of things I can't do. 
If you can type, you can code. Programming is a skill, not an inborn trait, you simply need to learn. The fact that you mastered english grammar tells me that c++ grammar is not beyond you. If you must decline on inability to code, say it right:
"Coding is just one of the million things I do not have the dedication to learn"
