one of my guys was called as a witness in some legal proceedings just about 12 months ago. The question he was asked was "in your opinion, would the fatality have been avoided if the driver had proper control of the vehicle - and by that I mean both hands on it ?"
eating / drinking, etc. are viewed as "not in proper control" because the hand is being used for other things than steering, not just because the other thing might distract the attention.
there were really two things that I was trying to bring up, firstly that driving one-handed is unsafe, but the second is that even if personally you don't think it is unsafe, you should still be able to work out that the authorities are going to take a very dim view of it, so posting it on a web forum is a mistake.
In the above legal case, if the driver had posted "I don't use both hands", then that may have made the difference between a "due care and attention" and a "death by dangerous driving" with attendant prison sentence. ( well, if it was in a civilian court anyway )
I come from a place where driving safety is taken very seriously, but even so there is no excuse to lower standards just because you're driving on a public road. Both hands on wheel, never further than top or bottom is a good standard