If you can learn how to program, you can learn how to understand this. You first must learn the notation, just as when you learned "def", or "func", or "[x for x in ...]", or "int main() { ... }", or whatever your favorite language's notation is.
"Accessible" doesn't necessarily mean "with just knowledge of English, you can jump to this example and immediately understand what it means". Some work is always required; accessible just means this work is not too hard.
For example, Python's notation has been occasionally described as "accessible", yet I wouldn't expect my mum to immediately understand a non-trivial Python snippet (so no "print('hello')") without any previous explanations.
"Accessible" doesn't necessarily mean "with just knowledge of English, you can jump to this example and immediately understand what it means". Some work is always required; accessible just means this work is not too hard.
For example, Python's notation has been occasionally described as "accessible", yet I wouldn't expect my mum to immediately understand a non-trivial Python snippet (so no "print('hello')") without any previous explanations.