It's not a completely inaccurate statement. In many ways, the coroner is passing the buck. A ruling of homicide satisfies public outcry without declaring guilt. It just means someone else contributed to his death, not that it was necessarily murder.
I haven't read the autopsy reports or combed over every bit of evidence, but IMO, the video tape shows Chauvin went too far and should have some form of culpability in all of this. What that level should be, I don't know. I don't have all the facts of the case at my disposal. Just at a glance, it seems like at least manslaughter is warranted. But again, I don't have all the facts. I don't want to deflect from the guilt Chauvin should carry, because he absolutely should carry some, but how much is still in question IMO.
I'm not one to defend police that go over the line. They shouldn't get a pass because they are cops. In fact, they should be more scrutinized because they are cops. People charged with upholding the law should never be above the law, and should have a larger microscope on them when they mess it up. A higher level of expectation should be part of the job description IMO.
It amazes me that anyone can watch that tape and come away with the opinion Chauvin did nothing wrong. Even if you believe he's not guilty of a more serious offense, I cannot see how anyone defends his actions completely.