The Constitution is also silent on cannibalism...
Scalia never said anything I know of about canabalism (thouhg he may have). But you can find what his thoughts on Roe were. My point is not any moral argument, just acknowledgement of what I have understood about Scalia’s view on Roe. I think you will have a hard time asking him about cannablism now.
Probably most of them viewed abortion with the same revulsion they would have viewed cannibalism. But now the Democratic Party considers the right to have an abortion the most important of our constitutional rights.