Imho nobody can tell "I'm breaking speed limit responsively". As you said, shit happens all the time. And what happens, if "shit happens", and you kill yourself? Don't you feel responsible to your wife, to her kids? I won't call this responsibility, in fact this is selfishness.
I'm very very sad about this whole thing. You don't know, but maybe a month ago, "shit happened", and we had to bury my grandma's elder sister, who died becouse of a car accident (at the age of 90 btw, this is nonsens

), and after two weeks, his son died too (he was driving the car). They were the innocents in the accident.
My dad's crash yesterday was very very similar to their's. So you can understand now, why I'm upset about the whole thing so much.
"non-speedlimit-breaking ppl who drive extremely careful and slow but seem to have left their mind or eyes at home"
Imho this is as much bad as breaking speed limits. Not less and not more. Not behaving as the rules tell you is dangerous, it doesn't matter, that it's the breaking the rule of awereness or the rule on the speed limit.
"...and the only way is awareness of life's dangers."
True, so true, but when "shit happens", and it's not you, who was not aware, then this won't really eas your beloved ones.