Bullshit. J.R.R. Tolkien, John Kennedy Toole, Rudyard Kipling and Stan Lee were all veterans, and one thing they never lacked was the creative spark, despite Tolkien in particular living through hell on earth. Military service does change you, but it recontextualizes creativity, not stamps it out- honestly, the need to produce real results that stand up to real challenges makes the military value and cultivate creativity in a way that fields like bureaucracy and law abhor. If Richard is having a problem with creativity, maybe the problem is him- especially since he's the one who deliberately smothered his best idea (Jawbreakers) for no reason I can figure out.