You are not wrong
Ancient has never been a comfortable map for Navi, they might have never picked it.
Teams do tend to have one week map
Map like ancient and Vertigo tend to be anti strat maps against t1 teams who rely on firepower
karrigan's most overrated aspect as an IGL is map vetos
playing big balls maps doesn't work when your team is lacking confidence
they're higher seed so they have a guaranteed start on CT side, they should push maps like Nuke and Ancient to finish quickly