Indeed and it was an open air mass too; I mean would you cram a whole company into a shack in their part-wool uniforms after complaining about the heat earlier?
The trenches were apparently 1.5 metres deep, so upper chest/shoulder height for most people. Collecting weapons and ammo would have been done under fire from the KAT positions; they withdrew to cover between attacks, they didn't go home. Even if they did, you want your guys in or near their defensive positions, not partly-dispersed around the kill zone trying to decide if each round they have recovered is 7.65, .30, .303, or 7.62; using enemy ammo and weapons could have literally backfired on the defenders.
All that aside it was a movie and showing point by point all the preparations and processes would have made it incredibly dull and boring to about 95% of people watching it; myself included. Movies are entertainment, documentaries are information. It could have been worse, Mel Gibson wasn't involved, so it wasn't all blamed on the English.
