Here is an analysis on the myths about samurai and some misconceptions. This include testing the sharpness to civilians and criminals.
I would would consider Metatron as a reliable source as he studied it and has proper credentials in and cite references. Didn't whitewash but just put it into context.
https://youtu.be/q28qcAxkO84
Not that smart to use sleep all the time. They won´t get any experience in fighting that way. What if there is a time that something doesn´t work? Like someone having a high resistance later on.
The thief is probably used to bloodstains, but the cleric will have to work hard to scrub them out. Yeesh, the cleric looks too intense after murdering those goblins.