It depends. In some ways, they can be. Erotic stories, if well - written, can explore human nature, relationships, and desires. However, they need to be presented in a tasteful and respectful way. If they are just for the sake of titillation without any deeper meaning, then they may not be appropriate. Also, different cultures and societies have different standards regarding this.
Yes, to a certain extent. Erotic stories can be a form of artistic expression. For example, some classic literature contains elements of erotica that are used to depict the complex emotions and relationships of the characters. But it's crucial that they are not overly vulgar or offensive. They should also be clearly labeled or targeted at the appropriate audience.