Well, she is an artisan. She likes freedom and needs to go with the flow. I have an ISTP friend too and she seeks advice, but only to some friends in her inner circle. I am in her inner circle, I like to think, because she askes me for advice a lot. Anyway, for an artisan you have to let her take her own responsibility and ask her a lot of questions. If you want to give her a hint without taking away her own responibility over her freedom, make up a small story of you giving advice to another person with the same problem your ISTP has. This is a little thing I learned.
Do you think your drive is genetic?
Hard to say without proof.
My opinion is that this is a ongoing debate about nurture vs nature. I think both are important. And if you ask me, my drive is nature and nurture: My mother wanted to give her children a better future and she always 'pushed' us to our limit. A nuance is that this has always taken within ethical boundary and we were given our own choices. But when we did make one, she did remind us always that we needed to strive for it. This situation was a bases for my strong personality and I use personality in the context of an ENTJ global patern of behaviour.
Result: I am an university student and have had great achievements in my sports career. Now I am in my coaching career and I still use this universal choice making and striving thing everywhere in what I do.