Latin America was the geographic area had the most population and economic activity during the colonial period. This area is rich in minerals and raw materials in which these were traded by other countries. This has also the most number of nations inside it.
Rizal arrived in Madrid, Spain in 1882. There he studied the practice of Medicine, but his time in Europe allowed him to write a book exposing the Spanish colonial relationship with the Philippines. He then became actively involved in propaganda for a Filipino movement. In his time at Spain he learned how the colonizer was treating the colony. This allowed him to write his work, "Noli Me Tangere" which was published in his time in Germany in 1887. This sparked movements in the Philippines such as anti-colonization.
I think it was because of where it was. It had more control and had more to help them. I might not be 100% but thats what I could say.