Mechanically, the Samurai is a powerhouse because of the ability to just decide “I have Advantage this turn” a few times a day. Not that you can’t make your Samurai just like the real-world namesake if you wanted to, that’s up to you. Samurai as a Fighter subclass is not bound by the name Samurai. Just saying the word evokes certain ideas and images of what a Samurai is, what a Samurai does, and how a Samurai fights.
