Pushing the responsibility from cyclists onto drivers is bad here because the responsibility not to maim and kill people with these one-ton death machines should mostly be the driver's.
After the cyclist has taken appropriate measures (riding correctly; correct lights and reflectors) there's not much more they can do to protect themselves. If they're not riding correctly that's the problem you should be trying to fix - an idiot on a bike is still at great risk of death, even if they're ultra-reflective.
You're assuming that this reflective spray increases safety. You're then telling people who don't buy and use this product that they're stupid. And you're not saying anything about the dangerous vehicle drivers who cause most road deaths.
The Euro NCAP safety rating was heavily updated a few years ago (2007-ish) to improve pedestrian and cyclist safety. That's why most new cars that come out have those ridiculously tall and flat noses.
Sure, don't blame the victim. They'll be dead - but it's much more important that no one blame them!
I assume you never lock your car or your house? Because if someone robbed you you are not at fault! Victim blaming!