[Telemakhos]

Recognizing that the exposure myth of Romulus and Remus is an analogue of the exposure myth of Moses, of Cyrus, and of a host of other famous figures gets one thinking that early Roman history and early Jewish history, among others, map common Eurasian stories onto particular agendas.

[Amezarak]

Or perhaps its because infanticide via exposure was a very common and widespread practice for most of human history.

Either way, there's a large gulf between "Romulus and Remus weren't real" and "Romulus and Remus weren't exposed as infants." You obviously don't believe Cyrus is fictional.