No, I'm simply answering the question "How many big chances did we and West Brom create?". A big chance has a relatively high chance of being converted into a goal; that's not at all the same as saying it "should" have been converted. To look at it in terms of the xg of the chance, Crnac's big chance had an xg of 0.43, meaning the average striker would convert it 43% of the time, i.e. the average striker has a greater chance of not converting it than converting it. "Should have" is simply not a useful concept to employ in this context.
I understand xg Robbie, but what you have explained so well is that based on the chances created the probability is that we should won. Welcome aboard the positivity train Robbie!
More to the point might be the fact that Heggebo's late miss was the only shot they had in the second half while they parked the bus in front of their own goal.
