I am finally beginning to see your point now. If the defenders' job is to keep to the ball out of the net, 1 goal from 19 shots is pretty good. The team as a defensive unit need to stop Bolton from playing and getting those 19 shots on goal on the first place. This is therefore where we failed on the weekend. On the other hand, the 1 goal from nineteen shots could be attributed to Bolton's wastefulness, rather than good defending.