Ophenia's World View
Alexander's main real objection wasn't that people would find priestesses giving such services repulsive, in fact, he believed that Ophenia was right in saying that such practices might boost the popularity of his religion.
No, the real reason why he didn't want his priestesses to be involved with such work was because he didn't want his temple to be involved with such institutions, at least too openly.
But he didn't say this out loud so as not to shoot down Ophenia too strongly.
Instead, he used Adhania's sense of convention to propose a slightly different method, "Your plan was quite good, and we can keep almost everything with only a little bit of it tweaking." Alexander said smiling at Ophenia.
He then gave his own plan, "Instead of using the priestesses we can employ regular girls who will serve the men like usual."