Don’t get hung up on my casual Han Solo reference. It wasn’t the point. Substitute some other example from fiction of a character who actually is an effective fast-talker and the point remains that some players will want to have a character like that even if (and in some sense likely because) they don’t have that sort of personality and talent IRL. A big appeal of roleplaying is getting to imagine yourself as someone different than who you really are, and not just in terms of athletic or fighting ability.