Interestingly, Heinlein wrote a story ("Coventry") which pretty thoroughly puts the boot into macho writer posturing.

Of course, this was an early (1940) story. It has been noted by others before me (e.g., Asimov) that Heinlein's political and other attitudes seemed to change very abruptly when he divorced Leslyn and married Virginia. Which raises the question, did he change his opinions gradually but keep them a secret until the divorce? Or what? Maybe the second volume of the new biography will answer that question, although I am not hopeful.