Vaccines are a good example here. Handwashing is another. We've had empirical proof on the latter since the 1850s, but it's STILL super hit or miss whether people will bother :(
To me, not very important. Quality of writing ranks higher for me.
I don't think a different voice can fix a bad movie. That being said, I can't think of any actors whose voices I can't stand.
OTOH, Brotherhood of the Wolf does come to mind here. It's a French movie; I've watched both with subtitles and dubbed. The voice actor for the English dub doesn't quite fit the character.
Is that a fact? Are you sure? Will you recant if it comes out that the police did, in fact, plant it?
Nitpick the lawyer's phrasing all you like; it won't actually change any of the facts of the case, whatever they may be. Myself, I'm not going to jump to "why bother having a trial? The police arrested him; he's clearly guilty as sin" based on a Lemmy comment!
Aha! Today IS a good day to cook! Start chopping the veggies!