general problems of the 2010 Lexus RX350

10 month old 2010 Lexus RX 350 has loose bumper all throughout. Possible the very bottom gently hit something and now the entire bumper is falling off now. Brought it to dealer and he said if it's hit in the right spot the plastic bumper will be loose, but won't fall off, however if impact was on one side only, why is the bumper completely separated under the headlight on the other side of the car as well and the gap is increasing. I looked online and many people have this problem and it's speculated that the bumper was put on with too few clips to hold it in place. Beware, the 2010 Lexus RX 350 is poorly made as a bumper should not come off from someone's knee or little scratch. Aren't cars supposed to be made to withstand a little dings without compromising an entire bumper?!.