I remember a very good baseball pitching instructor telling me that he (with proper training and hard work) could get any kid to throw a ball 80 miles per hour by the time he was a senior in high school, after that it’s all genetics and no amount of training will significantly increase velocity.
What sets those with a natural born talent apart from the rest, is the ability to throw the ball 90 miles per hour and hit an imaginary target 60 feet, 6 inches away. And also make the ball change course while it is en route.