When any of us sees something in cinema that doesn't line up with our area of expertise (whatever that might be), we need to remember it's NOT A DOCUMENTARY - it's just entertainment for the masses.
(And not a training film)
I don’t think anyone is confusing the two....for me WW II history is a passion, last year I spent two weeks in Europe on a Stephen Ambrose Historical Tour, it followed the Path of the Band of Brothers, thru England, France, Holland, Belgium, Luxembourg, Germany and Austria....Fantastic Trip.
Movies are entertainment, they are not the real thing...
It was a nod to the Niland Brothers (https://en.wikipedia.org/wiki/Niland_brothers), which is a true story.
It also brings to mind the Sullivan Brothers (https://en.wikipedia.org/wiki/Sullivan_brothers)
I would love to visit Normandy for D-Day commemoration. I’ll get there next year, maybe.
Instead, I’m going to Bedford, VA, to the National D-Day Memorial. (https://www.dday.org/)