Because, if you did your research, you would understand that landing on the moon is a soft impact and, due to the low gravity, requires very little thrust to slow down the landing (and taking off utilizes explosive bolts).
If you also did your research, instead of speculating about the achievements of the greatest engineers of our time (with no actual evidence), you would understand that the moon landing EXCEEDED expectations and was such a soft landing that the shock absorbers didn't even activate.
This is all presuming you actually look into things before challenging their validity. I know, backing up your beliefs is difficult. Stinky.