A better analogy, that maybe is more fitting, is you blow through a stoplight and kill someone.
That's definitely negligence but there was no intent to hurt someone, the intent was to speed to a destination.
The intent here was to use computing resources to launch an attack on another hacker group, nothing that would have intently harmed a person at the clinic. They could have accidentally hurt someone though.
And if they did it would be recklessness, certainly negligent , but their intent was not to kill someone.
And this is why we in the US have different laws for different situations that take into account negligence, intent, premeditation etc.
None of them are alright but the state of mind the person committing the crime was in makes it varying degrees of bad.
Someone who accidentally kills someone and someone who plots a cold blooded murder have both taken a life but, the one who killed on accident isn't as heinous or maybe as morally reprehensible.
Life is mostly varying shades of grey and not strictly good or bad and that's why society has complex laws to dole out different punishments depending on situation.
And finally, the hacker never harmed anyone in this case arguing on what they might have done is an abuse of the system imo. I might get up right now and burn my neighborhood to the ground, but you cant condemn me of it before I actually do it. (I won't)
No one mindlessly hacks a utility control system.
10 years is egregious and heavily punitive. The prosecutor that speculated that he "could of caused harm" and that was what the entire punishment was predicated on. Our legal system is entirely draconian when it comes to computer crimes.
This should have been criminally probation or a few months in jail and a civil suit brought by the client for any actual damages.
I'm not saying there was no wrong doing but you're not going to convince me that the minor damages were worth 10 years of this guys life.
A more reasonable sentence would have been 2-3x the cost of the cleanup—and details on the systems that were compromised—plus a certain amount of (extrajudicial) social ostracism along the lines of ISPs not being willing to sell him Internet access based on his past history of abusing such privileges.