There a moment in The Free State of Jones when a ruggedly-dressed, boot-wearing Matthew McConaughey is walking through a woodsy area, and he approaches a few mid-sized puddles. Instead of stepping around them, as any sane person would, he splashes right through, soaking his boots and almost certainly his socks and feet. “What did you do that for?” I muttered from my sixth-row seat. “Are you indifferent to your feet and socks getting soaked inside your boots? If you say yes you’re a liar.”
Nobody likes wearing soaked or soggy socks inside lace-up boots. I’ve been there. It’s really uncomfortable. If you’ve slipped into a puddle or a stream the only thing to do is to put fresh ones on and air your boots out in the sun for a couple of hours.
In real life nobody walks right into puddles or splashes through shallow streams with their boots on — nobody — unless they have no choice. Guys in wartime combat situations, etc. But guys in movies do this regardless of circumstances. Because, I’m guessing, (a) it makes them look rugged and manly to slosh through but (b) stepping around puddles or crossing streams by stepping on rocks makes them look like sissies.