Why didn't Dorothy stay in Oz?

Because she felt guilty for being rude to her Aunt and Uncle and running away, and when she saw the images of her aunt crying she want to go home, she did want to stay in Oz but she did realize she had her own oz in Kansas, like she had her own tinman, scarecrow, and lion, she had a witch to in Kansas (ms.gulch) so she realized there could be color, if she look down in her heart......there's no place like home

She says it herself: "There's no place like home."

BTW, have you read the book? It's somewhat different than what the movie turned into. The biggest difference is that L. Frank Baum didn't try to excuse Oz as a dream. The trip actually happened. The film version makes it sort of a psychological study of the mind of a wistful teenage girl.

If you read the subsequent Oz books, even Dorothy can't stay in Kansas forever. After she went home and settled in, she went back to Oz and on other adventures. Sometimes the anchor of a caring home allows people to more easily go roaming. Anyhow, she finally took Aunt Em and Uncle Henry to Oz with her.

Anyhow, the black-and-white versus color helped the movie company show off the brand new Technicolor film. They kept Kansas black and white both to enhance that contrast and to show how far Oz was from anything they'd seen before. It worked exceptionally well because even though it was released a couple months before the stock market crash, the Midwest was in bad shape due to the Dust Bowl.

And yes, I did read them all. Back in the dark ages of the mid-60s, not all of us had air conditioning. In the dead of summer in southeast Kansas(!), I would leave my home for the coolest place in town, the public library, and tear through the stacks, including the Wizard of Oz.

Because theirs no place like home. They didn't lock her out of the cellar, though its been a long time since i read the book.

The point of the book is that although you can get all magic you want out there no adventure compares with coming home.

Also given the way she awakes it leaves an ambiguity as to whether she actually went anywhere.

Haha, pretty good question. I guess it's just old-fashioned family values, as in she had to return to her family just because they're her family. And maybe she has friends back home too. Plus it's not like Oz is perfect. They have those creepy apple-throwing trees and flying monkeys and stuff.

well if you were thrown into another state by a tornado, you would miss your family wouldnt you? even though the state you got thrown into was better than where you used to live.

The answerer to that question is said by Dorthy , There no place like home .