All people have strengths and challenges in learning.
There are things each of us are good at and some things which are more difficult. Each of us struggles with some things whether it be reading a dense novel or taking notes in class. Learning challenges due to these issues are not considered learning disabilities. Of course, struggling with a learning disability can cause other problems like motivation, depression, anxiety, self-esteem issues. A full battery of cognitive tests can identify a significant learning issue which could be labeled a learning disability.