Love that Esperanto reference. Zamenhof himself would've been proud of the revival pf his ancestral language, Hebrew.
A few reasons that I can think of: 1. You are a linguist and have a professional interest in the language 2. You are a language enthusiast and want to learn as many languages as you can. 3. You want to learn a constructed language, but don't want to learn one that is based on a fantasy or science fiction setting. 4. You have some interest in the Esperanto community. 5. You are crazy enough to believe Esperanto would ever be adopted as a world language.
Esperanto and Hebrew are sometimes considered to be sister languages, both having been devised by Jews in the Russian empire around the same time, each aimed at a specific community. And before dissing a language community, you should first read up about it. Try Bridge of Words by Ester Schor - the book describes the Jewish background of the author of Esperanto and how it influenced the philosophy that motivated the language.