First, it's all based on a book written nearly 50 years after the fact based on stories by a bunch of brave men who are trying to remember details at an advanced age. There's a reason human eye witness testimony is almost always a shoddy piece of evidence in a trial. They aren't lying, but over the years stories change and a more favorable version of the events tends to form as time passes. They couldn't even all agree on Sobel. Some of E company saw him as worthless while others said they wouldn't be alive today if he hadn't been so hard and demanding of them at that time.
Also, the guy I quoted was making his wild assumption based on this movie which only followed this small handful of men. I know there were tons of great stories of heroism to be told but this account didnt recall them.
Point is people then were a mix of good, bad, brave, cowardly, determined, and lazy just like people of every generation since. Human nature is to endulge in a reverence for fictionalized nostalgia as more snd more time passes. That's why there are always the "good ol' days" which in many instances weren't always so good.