I see it as inexperience maybe like Graves than a lack of ability, but I am with you that Girard even with physical limitations possesses levels of better IQ ability and that way gets him out of trouble. I see Bear as the next generation of Dillon, perhaps better in potential (aka more offensive output).That isn't to say he's bad. He's going to make a very fine 2nd pairing defensemen for years to come. But the guy gets lost in coverage an incredible amount.
Oiler fans are particularly crazy when it comes to overvaluing their own players, take a lot of their opinions with less than grains of salt. From the history I've had with them, they are probably the third or fourth most insane fanbase on this site after Rangers (1), Canucks (2), and what other original six team is doing good (3/4).