Hi Rochelle, no they are not in opposition with each other because I state that tweeting your content is good when done in a mix with other people's content. Too many people use Twitter as a self promotional tool and don't share other work or tips or content that their audience would find useful.
Making sure pepole see your work includes tweeting it and sharing it on G+ and Facebook and sites like Digg or Reddit. Just because your share your work doesn't mean that you are only sharing your own work. Make sense?