Why isn't the Spanish bullfight immoral, according to Catholicism?

The Catholic Church has never condemned this traditional event in Spain and the Catholic Encyclopedia (which received Nihil obstat from the Church, that is, apparently the Catholic Encyclopedia is free from doctrinal errors) accepts that the Spanish bullfight is not immoral . It seems to me that the purpose of the Spanish bullfight is just to have fun with the suffering/death imposed on the animal. How exactly is this cruelty/sadism in keeping with Catholic ethics?