If we are going to take St. Thomas Aquinas as an authority here, then we all agree that explicit faith is necessary for all for salvation. The Doctor tells us that this is so important that God will send a messenger, even an angel, to get this faith to the person. So, God can work a miracle to get the faith explicitly articulated to the perishing soul. But God will not work the miracle to get that person baptism. This would seem to be the issue: that God will work the one miracle, but not the other.
I reject this as absurd nonsense.
In Desire and Deception, Charles Coulombe argues that this absurdity comes from the Aristotelian notion that the intellect precedes the will. I think he is entirely correct.