Thematically speaking, a thesis that focuses on conformity and rebellion is very possible to do from the story "Two Kinds." The thing to remember about writing a thesis statement is that it is largely a statement of opinion. It is possible for you to write a thesis statement like the following:
"The story 'Two Kinds' shows the themes of conformity and rebellion."
The above statement is a statement of opinion about the story. In the body of your essay, you will need to prove to your readers where those themes are illustrated. Broadly speaking, Jing-mei is rebelling against her mother's wishes instead of conforming to them.
The previous thesis statement is manageable, but it is also really boring. I would recommend doing a thesis statement that is a two-part statement. That kind of thesis allows you to write about two sides of an issue. For example:
"Although conforming to Suyuan's wishes would have been difficult for Jing-mei, rebelling against her mother was a much more difficult action."
That thesis now allows you to focus on the themes of conformity and rebellion while also discussing the impacts that each action would have on the characters.
Conformity and rebellion are evil twins that humanity has been nourishing since the beginning of civilization. As we conform to the social norms that surround us everyday, we are trapped inside of this overwhelming system where we easily lose ourselves as individuals. On the other hand, the urges of rebellion that live in our ego compel us to break from the state of our bondages. Yet, our superegos are trying to keep us in a reasonable threshold, and enable us to stay in the system. As a result, people are fighting a constant internal battle of conformity versus rebellion. As Herman Melville describes in his story "Bartleby the Scrivener," humanity is hopelessly struggling between conformity and rebellion. He presents us with images of entrapment and death to address his concerns for the issues of conformity and rebellion.
The images of entrapment are evident throughout the story. From the "lofty brick wall" outside of the office window to the sound-dividing prison walls which Bartleby died within, the narrator traps the readers in his dark replica of reality.
Looking out the office windows, "the light came down from far above, between two lofty buildings, as from a very small opening in a dome." The physical confinement of their dark and depressed office space is apparent through the images of the dim lighting and restricted view. For Bartleby, the confinement is no longer physical but psychological. "From his long-continued motionlessness, that behind his screen he must be standing in one of those dead-wall reveries of his." This unusual behavior is a common act of such character. It is not the act of boredom but desperation and hopelessness that disintegrates from within and disables him from engaging in any productive activates. As the narrator takes the readers to the final resting place...