Meh. Some people just get uncomfortable about certain things.
I'm not thinking too much into it.
IMHO Nick Foles has massive stones based on they way he played in the 2017 Superbowl. His defense did little to slow down the Pats and he had to make plays. Not only did he perform on the field he was the one that called for the Philly Special on 4th down, which is by far the franchises most iconic play:
So many other players get smaller in that large of a moment. He rose to the occasion and dominated. That's completely worthy of the nick name onto itself.