Ielts Writting task 2: achieves their aims in life is mostly by a question of luck

I don't understand your suggestions "make it perfect", currently my essays cannot reach bands 7.0 or 8.0 because my ability isn't good enough. Many essays with different topics help me develop ideas in each topic and know how to use more vocabulary. And then I will upgrade my essays later, now I need not to make many basic mistakes.

Thank you very much with your feedback.