Like predicting tomorrow’s weather with 70% accuracy, strengthening summoned creatures, the ability to harvest plants a few days earlier, using the magic of dragons which existed in the past and so on.
Since this power was determined from birth, there was no way to choose or change it. There were many cases of people unable to harness its full power. For example, the innate talent to increase the destructive power of magic, if the person was unable to use magic, then the innate talent would be wasted.
Only the lucky few are able to use their innate talent to its full extent. Aside from people with powerful innate talent, innate talents that could decide the entire life of a person were rare.
A warrior like Gazef Strolonoff didn’t have innate talent, proving this point.
Those with a combat oriented innate talent tended to choose adventuring as a career. That’s why you could find many people with innate talents among them. The innate talent possessor before him just happened to be one of the lucky ones who could make full use of his.