but shouldn't the resulting death play a part in the punishment? You don't mean to kill someone, but if you do it's manslaughter, not assault. Usually a death changes the charge.
It's only manslaughter if you unintentionally cause death as a result of committing a criminal wrong. Unless your driving pattern over a sustained period of time immediately before a crash is overtly out of the norm to such a degree that it can be described as being dangerous or criminally negligent or impaired, it is very difficult to prove a crash was the result of criminal driving behaviour.
In this case, there were several witnesses who remained to give statements to the police. On review of those statements, she was charged not with dangerous driving or criminal negligence causing death, and not even with careless driving. That suggests that from the police and witness points of view, she was driving normally and acceptably aside from making a left turn in front of an approaching vehicle. According to some witnesses at the time, the motorcycle may have contributed to the crash by running a stale amber light.
She was charged with making an unsafe turn. Ordinarily that would result in a simple POA ticket with a set fine which she could pay out of court. Because of the death, she did not get that option but instead got a summons compelling her to appear in court at which point she pled guilty. Instead of paying the set fine of $85 plus victim surcharge, she was fined the maximum of $500 plus victim surcharge. That's over 5 times the usual penalty, because of the death, so the death did in fact play a part in the punishment.
This may still seem like a paltry amount considering someone was killed, but you punish for criminal intent, criminal act, or criminal degrees of negligence. This crash had none of that. Not seeing or misjudging the speed of an approaching vehicle and then making a left turn in front of it, in absence of overtly criminal driving behaviour at and immediately before the time, is an unfortunate but simple mistake that usually just results in angry blowing of horns and the occasional fender bender. EVERYONE makes those kinds of driving mistakes from time to time.
A given act or mistake is either criminal or it is not, irregardless of outcome. If a given mistake in absence of death or injury is not worthy of criminal charges or penalties, then neither should that same act incur criminal charges or penalties when someone is hurt or killed for that mistake.