They already had LIDAR, which can easily pick out static objects. The better radar means they have a lower-resolution fallback for poorer weather and longer ranges.
This is adding extra LIDARs, on top of the one they already had. Tesla had its issues because they are trying to do it on the cheap with only cameras, radar, and ultrasonics. That specific failure mode would have been prevented with the hardware that any other self-driving car developer has had for years.
It is also my understanding that none of their cars in computer driven mode drove full speed into a wall or other static obstacle.