Sometimes it is, sometimes it is not. (Community service is an alternative to jail, for example.)
Coerced sex is rape, however. It is qualitatively different from coerced labor. As Dworkin wrote a long time ago, "in prostitution, no woman stays whole. It is impossible to use a human body in the way women's bodies are used in prostitution and to have a whole human being at the end of it, or in the middle of it, or close to the beginning of it. It's impossible. And no woman gets whole again later, after."
Coerced sex is rape, however. It is qualitatively different from coerced labor. As Dworkin wrote a long time ago, "in prostitution, no woman stays whole. It is impossible to use a human body in the way women's bodies are used in prostitution and to have a whole human being at the end of it, or in the middle of it, or close to the beginning of it. It's impossible. And no woman gets whole again later, after."