Questions on Grove connector

[vibnwis]

Hi there,
1. I feel very bizarre when knowing that M5Stack Grove connector's Vcc is 5V, not 3V. The reason being, Esp32 I2Cs are at voltage level 3V by default. Also, many I2C devices for microcontrollers are at level 3V as well. What benefit of having 5V Grove?

2. Grove connectors are made for I2C devices. Any most of I2C device require SDA and SCL lines to be pulled-up resistors. As such why Grove connector boards do not have built-in pulled up resistor?

Thank you