The shot, once made, is forever unless you do an expensive reshoot. Software bugs happen and people have low expectations for bugs even in highly scaling software like YouTube.
Given the way things are, whole movies are going to be made in post...
Honestly it's almost more notable these days when that kind of stuff doesn't happen.
You're basically paying more money to decouple and delay decisions as much as possible.
Though, nit pick -- when people say "fix it in post", they're not usually talking about editing.
Editing is an expected, normal, traditional part of the art of filmmaking. You're not changing or fixing the shots themselves; you are cutting and pasting footage sequentially to tell a coherent and compelling story. The YT you linked is a masterful example of how Star Wars was saved through this sort of editing.
"Fix it in post" refers more to making sloppy shots full of errors and then correcting those errors later with CGI.
Does that make sense? The art of stitching shots together, versus shooting crappy shots and CGIing them later.
That said, directors shoot v differently - some will do literal hundreds of takes and still do plenty of post, others will shoot max three takes and send to edit.
They do multiple, sometimes dozens, of takes for most shots.