I have not said that handheld is not possible. The original question was about the implication of a relative short focal lenght and I brought up this issue.
Maybe though I should have been more clearly that I was refering to angular movement, I thought it obvious in context of focal lenght.
Anybody can do the proof himself with the camera and lens he uses and his camera-holding technique. And see which kind of movement is the critical for him.
Yes, I saw that caricature before and somehow felt it applicable on me...
I lost it in my files. Thank you for bringing it up.