This is just a matter of it being hard for us to weigh the relative values of probabilities. I mean, just getting in a car creates a measurable likelihood that you'll kill someone, but it doesn't bring it to a level that most people would consider worryingly high. Ditto for, say, ironing clothes — you increase the chance that somebody around you will die (e.g. from a fire), but not by enough to ping anyone's conscience. Most people view speeding the same way.

This is not at all the same thing as being willing to steal somebody else's car just because you know you won't get caught. In that case, you know that you are creating immediate harm to that person. People weigh that differently from a vague chance of killing an abstract person.