Please, I'm asking for proofreading.

I'm writing a slightly formal essay,
please tell me what sentences I should rewrite.
Thank you.

Opinion paragraph : Success in life comes from taking risks.

I am against the statement that success in life comes from taking risks. There are three main reasons to support my opinion. To begin with, unlike taking risks, a long-term planning helps a person work more effectively. That is to say, a thoughtful planning helps the planner sort out his priority, hence it is no doubt easier for him to achieve the goal. Secondly, a risk-taker does not have a tendency to analyze his goal like an ambitious planner does. They do not possess an explicit goal. This results in necessity of waiting for a perfect condition to seize an occasional opportunity. The final reason, risk-takers tend to take chances and time for granted. This leads to the lack of time management. I personally know some risk-takers who only prefer waiting for chances and thus have difficulty managing their time. They therefore end up being disappointed with failures. From reasons discussed above, it is clear that success in life does not come from taking risks. It comes from meticulous planning.