Why were the earliest Buddhist sculptures similar to classical Greek sculptures?

The earliest Buddhist sculptures were similar to classical Greek sculptures due to the cultural exchange facilitated by the conquests of Alexander the great and the subsequent Hellenistic influence in regions like Gandhara, where Buddhism flourished. This interaction led to the adoption of Greek artistic techniques, such as realistic human figures and drapery, in the representation of Buddhist themes. Additionally, the use of iconography in both traditions showcased shared elements of storytelling and symbolism, further blurring the lines between the two artistic styles.