For a lot of people it is not difficult. For many others, yeesh.
Actually they had to catch me early on. I had to go to reading classes when I was 5 in order to catch up to my grade level. Even afterwards it was a struggle for years.
Then you have to compete with the numerous demands, struggles on kids down in such a place like Detroit. Then you get to their learned indifference....and yadda yadda. Eventually it is as if they and the world around them is messed up.