Well, it's not so much that they "try to", the leading function is "how you basically are", it's something that you can't change about yourself.
So for example, it might look something like this:
INXps: Try to deal with problems by retreating into their minds, like Enneagram Type 4s and 5s
ENXps: Try to deal with problems by having as much opportunities as possible and becoming "perfect", like Enneagram Type 3s.
IXXjs: Try to deal with their problems by relying on their "systems", like Enneagram Type 1s
EXTjs: Try to deal with problems by becoming more competent and practical
ISXjs: Try to deal with problems by being more harmonious, like Enneagram Type 9s
ESXps: Try to deal with problems by becoming more reckless, like Enneagram Type 7s.
What you're insecure about might also have to do with your weak, insecure or neurotic functions.
For example, I think I have a neurotic Fi. I am terrified of rejection. So I use my Fe in a negative way to emotionally "evaluate" others, and if I think that they're rejecting, then I avoid them and retreat into my own mind. It might also be the same with insecure Te, etc. But the real issue is that I'd have to deal with my insecure Fi. My leading and creative functions only work as tools to achieve my own goals, which can be either healthy or neurotic, positive or negative.