Forum Discussion
A long-running joke is also the 5 scariest words heard in film and video production: "We'll fix it in post." In other words, we expect the editors in post-production to somehow magically create a silk purse from the sow's ear we just dropped in their lap.
https://tvtropes.org/pmwiki/pmwiki.php/Main/FixItInPost
When shooting in a high-noise environment, even if you have the talent adequately miced, you're still going to pick up too much of the background noise, making the narration track all but junk. You can tell just by watching some of the home-improvement programs on PBS (like "This Old House") when they are in a high-noise environment, they will switch to narration recorded in an audio booth and lay that over the top of the B-roll video, with its audio potted down.