During TOS, it was fairly common for all kinds of ethnic people to play Asians. Then you have crazy things like Ricardo Montebahn playing Khan who is a Sikh but never adopts the affectations of a Sikh regarding their spiritual practices (a point very well explained by TheRealKingDaniel
in his Imponderables youtube shorts).
Some of that is excusable but embarrassing writing by early writers or them simply feeling such details were unimportant as the average American probably had no idea what a Sikh believed or did within their culture. It was a different time.
To do this in later series was a big mistake, particularly because Star Trek is an international phenomena. If an actor is good enough to be on the series, heck embrace his/her background and incorporate it into the show. Linda Park is Korean, so the writers could have included every Asian detail in the same manner but not switching it to Japanese culture. Things like her name, her background, her cooking, her martial arts training, etc. This is so simple to do.
The same is true of Patrick Stewart. He's a fine actor. Let him be English and especially since he can't seem to remember that he's French (saying things like schedule as shhed ule really gives this away).
The back story is that Hoshi had a black belt in Aikido before she joined Starfleet Academy, was running an quasi-illegal honor code violation poker game, and broke the arm of the captain who caught her doing it. Then nothing about those two things plays any role within the story, previous stories, previous examples of her performing those things, etc. It's a classic non sequiter. It also doesn't make sense that a person booted out of Starfleet would have then been on the maiden voyage especially since there likely would be other linguists who had followed protocol. Remember, the Vulcans are watching over the shoulder of Starfleet even about minutia.
Here's an imponderable about Enterprise episode "Observer Effect:
The Organians are inhabiting the crew of the Enterprise to observe the way that they respond to a contagious disease from a particular planet with a silicon based virus. In effect, the Organians are the observers and using a form of the Prime Directive, far before Starfleet adopts that principle.
Cruelly, they observe and have been observing for many hundreds...perhaps thousands of years when this sort of event happens. They dispassionately watch and then collect the data, but don't involve themselves.
Right away, the cruelties of such a form of observation are evident. When it becomes apparrent that Hoshi and Trip will die, the crew are deeply concerned, and a dialogue between the observing Organians demonstrates that one of them believes they should interfere and help the Humans.
What this really is setting up that the Prime Directive is evil through inaction
, and hence not moral, and should not be the way an advanced species deals with species who don't have the same level of technology.
And yet, this is one of the events in Captain Archer's life that will eventually lead to the Prime Directive...
The Prime Directive has always been a bigoted form of noninterferrence solely based upon warp drive technology. Can you think of anything more ridiculous? Why would this even matter? Say a race has advanced genetics skills, the best medicine in the galaxy, the most advanced linguistic ability, the best architects found anywhere, the most wonderful musicians, etc. Nope, sorry...you're a backward species.