For those of us raised on Robert A. Heinlein such characters are exactly who should populate novels.
As far as his writing skill is concerned, consider the huge volume of coherent sentences he produces [or used to produce] in a year. It's hard to argue with someone who can kill entire rainforests and cause printer's ink to be purchased by the trainload just by pushing a few keys on a typewriter or scribbling a little with a fountain-pen.