My best guess would be that the amendment was so badly written- designed more to score political points and damage the bill rather than actually being a genuine attempt to do the right thing by the country, that those opposing it would be paraded by the likes of Musk as being supporters of rape.
Obviously this is bollocks and a sign of the juvenile, point scoring, pathetic shit the the conservative party is shovelling, however, the amendment was not going to pass, so why give more ammunition unnecessarily?
Jess Phillips has balls of steel.