I like my fictional stories internally consistent. That doesn’t always have to mean they’re realistic (I like fantasy but I know dragons aren’t real), but they should be consistent within the rules they set for themselves. If the bad guys keep shooting at but missing the main characters, that’s bad writing. If it turns out later that they were all untrained, that’s great writing, because it’s internally consistent.
A lot of internally inconsistent stuff in film relates to sound. This is often done intentionally because viewers expect the incorrect thing, and it’s called the coconut effect. For example film makers dub in the cry of a red-tailed hawk instead of an eagle because a real eagle sounds weird and not what people expect an eagle to sound like. See the calls of a red-tailed hawk and a bald eagle below.
Other examples include suppressed gunshots making a barely audible sound (suppressors reduce the sound of a gunshot, but not by much), swords making a metallic “shing” when drawn from leather scabbards, punches making loud thwacking sounds, and of course coconut shells being used instead of horse hooves (this is what Monty Python were nodding to in The Holy Grail).
Speaking of firearms, have you ever noticed how people get knocked over by bullets in movies even if they’re wearing body armour and otherwise end up being uninjured? (except they’ll often claim broken rib, which is itself a bit suspect) That doesn’t happen — bullets have fairly little momentum and do most of their damage with penetration due to their small size relative to their speed.
This doesn’t matter much in the grand scheme of things of course, and I get that film makers are catering to average audience expectations rather than people who know more about firearms and bald eagles, but it always instantly makes me enjoy a movie a little less.