As mentioned previously, the main risk to this landing is engine failure. If the engine keeps going, and you don't catch a skid on that railing, then the landing and take-off presents 'little' risk to the aircraft or people on the ground. If the engine decides to quit at the wrong time then things are going to turn nasty. Its a question of whether you simply want to take the (relatively small) risk. It would be interesting to know what the statistics say in relation to engine failure in the 250-C20 series engine per 100,000 flight hours. Other than that, it can be argued that the landing was a well-executed one.
Perhaps the comparison between this 500 pilot and AS350 Nutter is a little harsh.