Curiosity doesn’t generally try to poke holes in the answer given. It seems more like you are arguing that they are in fact wrong.
Plus this is something that genuinely happens, not merely a law class hypothetical. People die if emergency vehicles don’t arrive, with far more than the likelihood that you would get hit the one time you run a light. The moral decision is thus clear: you run the light as soon as it seems clear. Just like you would to avoid hitting someone or any other action.
This is so obvious that we would hope that at least one of the police, prosecutor, judge, or jury would realize how stupid it would be to punish the person who ran the light. The only real question is if this has been formalized, or if we have to rely on prosecutorial discretion.
Because, regardless, the correct course of action is clear, and it is not simply waiting on the off chance you might accidentally not see someone and hit them when running the light. Most intersections have a clear line of sight by design, after all.