I think what could be concluded here is that top speed is not ultimately important for general road usage; that most cars are more than capable of exceeding it by quite a significant margin is sufficient for this purpose.
But the stronger point which has emerged, albeit off topic, is one of consideration for others.
Not just other road users who may become involved directly, and not just loved ones.
There's the emergency services professionals (they, too, are human) who have to cut a corpse from a mangled vehicle.
As TN said, even people you don't know (and will never know) are affected.