Using concession is very important especially for C2 and C1 Cambridge exam students.
It shows you know how to write a balanced argument which shows great writing control.
When you make an argument, you should always try and balance that out with even just one sentence that reflects on or at least acknowledges the other side of the argument or introduces some negative aspects or drawbacks, irrespective if you agree with it or not. It shows great diversity and range in your ability to produce an argument led essay.
So give it a go!