It's not. The idea that being innocent until proven guilty frees you of responsibility is wrong. They are on separate axis. People get tried and convicted of criminal negligence causing damage, injury, death / manslaughter etc and for that matter all sorts of other criminal acts quite regularly.
Would you say somewhere like the USA where people are usually quite strongly innocent until proven guilty has a problem incarcerating enough people?
Maybe I explained myself poorly. Of course the driver is innocent until proven/found[1] guilty. That's separate from the potential charges and punishment. It's the latter where the greater responsibility of the driver comes in.
[1]: If you're "just" fined, you can accept or take it to court to get the police to prove it there.
> Of course the driver is innocent until proven/found[1] guilty.
those two statements read as incompatible to me, possibly that's where the confusion in this thread is coming from. having your license revoked is itself a serious penalty in the US.
Unless you're relying on the license for work, I'd agree it's probably a more severe action in the US than here in Norway, where most people live in areas with well-functioning public transport.
There's one important detail that I had forgotten, as I have never been exposed to this thankfully. If the police wants to temporarily revoke your license, you have to agree. If you do not agree, it will go to the courts within three weeks[1]. The police, and courts, should weigh the impact of revoking your license against the severity of the incident.
[1]: https://nye.naf.no/trafikksikkerhet/lover-regler/tap-av-fore...
If a pedestrian suddenly steps out right in front of your car in broad daylight, in an area where it's not reasonable to expect them to (ie no crosswalk, not next to a school etc), then, as long as you weren't speeding or using your mobile phone, you'd most likely be fine. However if the pedestrian had for example been acting erratically just before, then the police might argue you should have taken more care.
Note that the paragraph I quoted applies to anyone venturing in traffic, including pedestrians. However, given the mentioned asymmetry, it usually falls down to the driver to be the more responsible party.
[1]: https://www.vegvesen.no/en/driving-licences/driver-training/...