I'd like to see the trailer of the Dirty Harry game... (link?) But, no.. It's pretty obvious...
The closer you attempt to get to reality, the more defined everything has to be. This has actually been discussed on here through different developer comments a number of times.
You try to make a character smile, and their smile turns out to appear to be evil or wicked or maniacal instead of just being friendly.
Why?
Because there's thousands of muscles that go into make a smile appear like a smile, and most of them don't have anything to do with "moving the lips into a smile appearance". It's the cheeks, the eyes, etc.. etc...
As games get more realistic, it becomes increasingly more difficult for developers to be able to manipulate all the muscles correctly so that they can demonstrate the same likeness.
There was actually a developer discussing this very thing on this forum previously (it was an article that was discussed here.. the developer ddn't actually have a conversation with us on this forum) where he said that they were using a great deal of muscles in the face in order to try to replicate a happy expression and when they did so, it turned out to appearc creapy rather than friendly. Why? Because the human condition is extremely complex and the closer that developers get to that complexity, the farther away they get from reality.. until they actually get to 100% accuracy.
It's better to be blurry, or not quite realistic, but still demonstrate friendliness, than it is to get closer to reality but fail to demonstrate the feelings you wanted to convey.