Why is the ability to adjust conclusions when necessary important to critical thinking?

If you use stereotypical and repetitive conclusions for essays/reports/studies, etc. It can get very monotonous and similar every time over. 

If you shake up your conclusions every once in a while will keep every one on their toes. If you repeat your conclusion, for example, if I used, '...and here we stop.' At the end of every essay I wrote, those judging/reading it will become more and more critical of how I write my conclusions. 

Sorry wish i could