Alien, when your prejudices, biases, preconceptions, mind reading is removed the facts are clear.
Both NBA players and dwarfs are performer. They incorporate their distinctive physical attributes and skills sets for onlookers that pay to watch their performances.
Both groups perform according to instructions from those who control them economically in a manner that panders to the expectations of those that control them economically. That is called working at a job. Very few people can afford not to perform when, where and how the employer dictates or expects.
You characterize NBA players as "sportsman" while suggesting dwarfs are victims of malicious exploiters. Would this perception melt away if both groups were paid the same? What if dwarf performers earned ten million RMB a year? Would your humanist concerns disappear?
It would seem you have no interest in the needs and feelings of the performing dwarfs. You impose your privileged perspective on them without regard to the situation they must, without choice, live with. A few hundred people work and perform in community, housed and fed, without your help. Why do you wish to deprive them of this? With your help, and your own prejudices, biases, and preconceptions, you would prohibit dwarfs from employment as performers. The result would most likely be the current dwarf performers being cast out of their homes and being reduced to begging.
You have clearly never experienced the Kingdom of the Dwarfs, nor the Minority Village, and have conjured, from supposition, bias, prejudice, weird altruism, and your mind's vision, of a decadent dehumanizing exploitation. Your conclusions are from your imagination. Your solutions would hurt the folks you think you care about.