Well, actually I am one of this 0.0001% and I think this number is bigger than you think.
Unreal is used by a lot of industries and especially the ones that are not game related, are totally dependent on features like that - that said, for me, the documentation is totally lacking in areas like the sequencer and batch tools.
At work we need to use the composure plugin and we are rendering a lot of movies with the sequencer, but we can’t write a proper (batch) script because we simply does not know the commands for it. The composure plugin works just with the right Capture Protocol … usually it’s just jpg, png etc … but the composure is something different and you can’t find nowhere this information 