Dude, you haven't had a single argument. All you've done is assert your opinion
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No because you honestly think that horrid scene from death note somehow is proof of great "acting".
You didn't even know the definition of acting. I'll tell you why that lil clip of animation coupled with a voice actor is horrid.
To have good "acting" one must strive towards what acting actually is. Let's cop the definiton of acting from wiki:
"Acting is the work of an actor or actress, which is a person in theatre, television, film, or any other storytelling medium who tells the story by portraying a character and, usually, speaking or singing the written text or play."
First of we need a living person. The animated character has to look as much as a living person as possible, he clearly does not at all look like a living person, he's clearly a cartoon. F minus right there. Avatar did a good job on this, an animated character that looked like a living humans. A plus for them.
Secondly he needs to have emotions expressed just like a living person would do, all the tiny miniscule muscles frowns and such that an actor implores to convey an emotion with his face and body language. The animated character fails miserably here as well, they might've drawn a couple of frowns on his forehead and animated his body to move, but how he moves isn't very human like either. F minus on this category as well.
Third and most obvious. It's a fuckin animation not a human thus it cannot act, voice acting gives him a slight tint of a real actor, the voice, but it does make up for the fact that the character absolutely fails on points 1 and 2. Even with that said the voice acting sounds horrid.
I could make this list super long on the differences so you might be able to understand why it cannot be good acting. But I'll leave it at that.