If you put 200 hours into a character by this point in the game, the second half of your statement is most likely false. Secondly if you have 200 hours on a character I think perhaps blaming a UI mistake or “accident” when changing character jobs is a bit of a silly sentiment.
You obviously chose this class and are unhappy with it, not only do you have to select a class, but you have to complete an entire quest that starts at that class’s npc trainer, and is usually several steps long with the name of the class at the top. Also at 200 hours I would find it a bit humorous to believe that anyone would so hap-hazardly select a character job that took them so long to achieve.
So if it was a UI error or accident, that was a really long accident you probably should have payed attention to somewhere along the line, and if it was not an accident, I am sorry you chose the wrong class, that is what the game is about, exploring the class system to its fullest making mistakes and trying again.
I know failing is scary, but that is the core of this game, failure is a learning experience, your next character will be stronger because of it. Telling the developer to offer you a special reset is off loading the responsibility.