Sales vs rocket science

In many areas of my career interests, I have come into contact with information that depicts sales as one of the financially rewarding. To my surprise, no one has ever mentioned how difficult sales. It is so difficult that many people never like sales. It is difficult that people do not trust sales people. I agree with the universal knowledge that emotions always stand in the way of smooth agreement. I am yet to see, hear or read about a men who say, with conviction and evidence, s/he mastered fear during sales presentation. Sales becomes so difficult that sales managers use positive thinking theory. But, what make sales so difficult to master? In my own opinion, I the reason behind the difficulty of sales is the near-impossible and ungovernable human emotion. It is not necessarily the emotion of fear that hold salespeople back from closing the sale but the failure to relate with a client in an ivory tower, employer's inflexibility-to get quick profit- through rigid rules towards employees. It is a generally accepted view that sales people are part of creative people and that rules can be interpreted differently but creative people; thus stifling flow of ideas. Lastly, it is very difficult to ask someone to invest in your service or product. You could not be expected to control the conversation with anyone you would like to persuade to spend their money on your service or product. These are some of sales' harsh truth that I found worthwile highlighting. Sales more difficult than communicated and it can be equated to rocket science.