Re: "...a [Lidar] blind spot low to the ground all around the car."
Not really, no. The whole sensor package looks mounted to the front section on the roof. There isn't any roof in front of it to block anything. I would expect the whole "blind spot" to be on the order of "something shorter than a foot, within two or three feet of the front bumper".
LIDAR maker CEO waxing about the indisputable need for more of its wares... laughable. That single one should have been perfectly capable of detecting the pedestrian, and I'm pretty sure it did too - at least at LIDAR reflection level. Why that never resulted in the car breaking is the actual million dollar question.