Another thing about those numbers in general... Yeah advanced metrics aren't everything but they're certainly capable of painting a pretty accurate picture. Just look at a number of guys sitting at the top of those charts, especially the ones who have logged a lot of minutes.
Spurgeon(Who is a fantastic example of what Girard could certainly become if he can really work these warts out of his game), Parayko, Karlsson, Suter, Hamilton, Slavin, Pesce, Letange, Klingberg, Brodin, McDonagh, Burns, Pietrangelo...
Some of them do very well because they simply dont give up a lot of High danger chances while they're on the ice(Pesce, Pietrangelo, Klingberg, McDonagh), while others are on the ice for a number of dangerous chances against, but do even better in the offensive zone(Burns, Slavin, Suter, Hamilton).
A big factor is certainly the difficulty of minutes as well. But it does paint a picture that suggests Girard has work to do in the defensive zone. Unless you're adamantly against advanced stats and refuse to acknowledge them, the evidence exists.