Jessica: Farewell, good Launcelot.
Alack, what heinous sin is it in me
To be ashamed to be my father’s daughter

What was the purpose of Launcelot’s visit? Where does the scene take place? Who was he going to serve?

There is nothing inherently wrong with being gay. speaking generally, opposition to gays are usually judged on people's moral basis whether it be religion, experience or other factors. to conclude, there is no objective answer to this question only subjective ones that rely on people's idea of what is right and wrong.