Corky knew what she wanted to be when she grew up and she was able to pursue her dream. Although America had some doubts other people had high hopes that she would be awarded a scholarship and become an athlete like Wilma Rudolph. Mack had his dream, but he had to switch gears because of an unfortunate event that left a permanent injury. In a way Mack still pursued his dream but the dream took a different direction then what he thought he wanted. Belle also pursued her dream and was very successful, even though her husband was opposed at first to her working. Eventually he supported her dream to the fullest.
If someone wants to pursue a certain career or direction in their lives, I think it is wise to encourage them if it is what they truly want to do. If their dream is realistic, encourage them and inform them what will be required of them. A person should be able to go in the direction their heart dictates and if it doesn't work out for them, it is life lesson and it is up to that person to figure out what needs to be done in order to obtain their goals. By telling them they cannot do something could cause resentment.