Greetings everyone! How important would you say dropper post is? Do you think it's a must have on a bicycle or you think you can it's possible to ride a bicycle in rough terrain even without a dropper post? Also, in the case I don't have a dropper post, if I adjust the saddle height very often during a day in the case I encounter different types of terrains or a succession of hills and valleys, would the friction force between the rod of the saddle and the seat tube damage the seat tube over time ?