In all these years, nobody has rear-ended me in the dark. Even if the back lights of my car doesn't blink.
That's not a fair comparison; a car has large taillights, but most bike tail lights are low-power LEDs.
Are you mad when car turn signals blink? Even brake lights turn on and off in an attempted to get people's attention.
Maybe blinking bike lights don't help. Maybe they don't. You raise an interesting question, but your thoughts and anecdotal evidence don't contribute much. There are some actual studies out there, and they seem to indicate that blinking lights are more effective. (This has a number of references.)
Just a thought (unsubstantiated): a blinking light may help differentiate a bike from other vehicles, and that may be useful. if there's just one bike and one car on a street, then that isn't an issue. If a cyclists is on a road with many cars -- all with steady red lights -- then it may be hard to recognize that there's a cyclist in the mix. A blinking light could make it easier to tell that there's a non-car on the road.