The average time served in the U.S. for murder, (basically an intentional, deliberate killing), is around 16.5 years. So 10 years for unintentionally killing someone doesn't seem too far fetched.What's eye-opening is that it's a maximum of 10 years per count. A person's life is worth that little?
And if given the maximum sentence of 10 years, that doesn't mean they will serve all of that. If they are well behaved they'll get out much sooner.
I'm not saying I agree with either. But those are the facts of the matter. Like them or not.
https://fullfact.org/crime/how-long-do-murderers-serve-prison/#:~:text=The average amount of time,served is about 16.5 years.