Of course.
In the United States you have the option to take your labor wherever you see fit. But when a majority of organizations and companies are exploitative what real choice do you have?
If the UFC cared about its fighters well being and wanted to grant fans the best fights possible, they would do a lot more to ensure they're taken care of. As it stands now, its abysmal to see what some fighters are making, and when UFC basically has a monopoly on the sport here in America your choices become much more limited.