Good point but also we've seen passes across the netminder, netminder not positioned correctly but shot has been bunk and hit the side of the netminder or side of helmet but classed as a save or the netminder been sprawled out on floor with no awareness of where the puck is and shot has been along ice and hit the netminder instead of tipped over him that also classed as a save.
I just think goalie stats are the most flawed but there's no way to get exact definitive stats for a netminder because of genuine attempt or luck.