In my local area an 18 year old lad stole his fathers range rover off their drive, drove around the local streets (uninsured) at 80mph, crashed in to a car, killing the driver and seriously injuring the passenger.
Why should anyone say it's worse.....or more trivial?
There is a Law in place in either circumstance and sentences for each offence.
Johnson has been sentenced; comparisons with other crimes are pointless.