Yes!! This is exactly what I thought when I read this post. I have often been asked that in interviews — why am I the best person for the job. So it doesn’t surprise me if people assert in their applications that they *are* the best person for the job.
Before you answer the question, you should clarify the answer for yourself. Ask yourself – “why am I the best candidate for the job?”, because only if you are sure about the answer will you be able to reply to the question in a confident and successful manner.