The stats laid out by mg show what I think most people already know. As he also said, it's not easy to score in soccer. If you've ever played competitively, you know this even more so.
Even so, you will hear people say "he should have scored" or "he's gotta put that away" all the time. Not just from fans but announcers as well. However, knowing how difficult it is to score, I've never interpreted it as comment on how easy it is to score and therefore the player should never have missed. Instead, it's always been an indicator of how rare the chance was.
For example, talles had an open header. Heber had a free shot on goal, albeit from a slightly poor angle. I'm both cases they were unmarked, which is rare. Such opportunities don't come often at the high level of the game.
At least that's how I think of it. I think most people feel the same way without articulating it as such when we're watching. Maybe because we're so used to announcers saying it so we parrot it? Hell, I bet if you play fifa, martin Tyler probably says it every other shot. Lol.
The stats breakdown was interesting though. Thanks for that.