[Fyron]

There is no contradiction. Just because someone is capable of catching a fish doesn't mean that s/he could do it in a timely, efficient manner. It might take said person 12 hours to manage to catch a fish if they have no knowledge of effective ways of doing so, whereas an expert fisherman could catch a fish in an hour, or even a few minutes if they know how to find places that are likely to have lots of fish to catch. Hence, having a high level of the skill makes it far more likely that you could gather food in a timely manner, whereas having no skill leaves a wide margin of failure to do so in a timely manner...