Someone not having your level of prudence and understanding in their MO doesn't mean they're idiots. Did you learn everything you know by reading the docs and best practices recommendations and acting accordingly, or did it take a couple of stinging mistakes to bring you to where you are? Your attitude is the stuff that nightmare bosses/parents/teachers/mentors are made of. Mellow out.
Dustin, from Smarter Every Day, has millions of subscribes and keeps his backup copies on old hard drives loosely placed into plastic containers. He also causally tosses them around.
He's hardly and idiot but...
Here's the video where Linus sets him up a 160tb server to replace his old "backup solution". https://www.youtube.com/watch?v=lcWSrIiR1tY
There are many videos by creators chronicling the solutions they've had to contrive to preserve their records and the cost/time tradeoffs they've made to continue creating while saving their archives.
Perhaps it's a matter of tone not coming across well through text, but you seem to be bizarrely angry at people on YouTube in general, even more so if they don't back up their video files.
You would be incorrect. The overwhelming majority of video uploaders on YouTube have never made a single cent.