I reckon its bollocks when people say "he didn't mean it". Unless it gets caught by the wind, it takes a deflection or they mishit it of course they meant it. They kicked the ball so how could they not? They might not even be aware of what they were doing either, they just automatically figure out how to kick the ball and could on an unconscious level actually of been going for goal.
So when you try and shoot on target and it spoons wide you don't mean that either.
Clearly if you're trying to do one thing and another happens you don't mean it. It doesn't really matter though, if a player has the opportunity to do something and it leads to a goal then whilst fortunate, they did have to create that chance in the first place.