Some people are naturally and unconsciously charming, and others, through a confluence of nature and experience, aren’t, and might not even realize it.
Is it fair for the less charming people to be at a permanent disadvantage? Or does being conscious of what is for others unconscious make one automatically manipulative? What if after a few months or years of intential charm, it became automatic?
Compare it to being a poor driver that is unknowingly causing stress and danger to fellow drivers. They take a course in defensive driving and consciously learn a few techniques like counting the distance between them the vehicle in front, not passing in the right lane, anticipating red lights, etc. After a couple of years of consciously driving like this these habits become automatic and traffic around them functions more smoothly. Practicing social skills is more like this than you probably think.
Learning how to write clearly and persuasively is another example that one could dismiss as manipulative at their own peril.