> I think, most people have potential to be able to code. By "can" I mean if they applied themselves to learning.

My time spent teaching makes me think otherwise. I saw so many smart, motivated young people who simply could not get their homework done. This was especially discouraging since my alma matter has a very strong focus on pedagogical programming.

There's something about programming that "clicks" for some people. They can look a the little pieces and immediately understand how to put them together. If you don't have that spark it's going to be an extremely challenging journey.