How does Rappaccini treat his art with more importance than his daughter and her lover?

Rappaccini seems to
attribute greater importance to his art than to his daughter because he has condemned her to a
life of solitude in a poisonous Eden for the sake of his experimentation. He raised her to be as
deadly as the beautiful purple-flowered shrub by the broken fountain, and she must live with the
knowledge that though her heart is loving and kind, her breath and her touch are unwholesome and
damaging.

Further, Rappaccini never consults Giovanni or his daughter when he
decides to convert the normal youth into a poisonous being like his daughter. For the sake of
science, he has raised a poisonous girl from her infancy, and now he seeks to transform a grown
adult into her poisonous match.  He never took his daughter's feelings or future into
consideration when he experimented on her; neither does he take Giovanni's feelings or future
plans into consideration before experimenting on him. He gives them no choice. In this way,
Rappaccini has placed his science (or his art, as Baglioni refers to it) ahead of Beatrice and
Giovanni.