I do it just because. It is easier to do some down on the deck stuff nice and low and close to the plane. I think most people who are that comfortable doing those things with their planes have a lot of stick time with them and know how they will react. If all else fails there is the kill switch. Lets see if I have the choice between loosing a couple grand or more or being dead/injured. Not really a choice because no matter how cool the plane is, its a toy.