Rolling shutter is usually not chosen because it performs better; it’s mostly a byproduct of the sensor technology used.

In many cameras, especially smartphones, the sensor is CMOS. CMOS sensors are typically read out sequentially, which creates rolling-shutter artifacts with fast motion. Global shutter is more associated with designs that can capture all pixels at once, historically like CCD-based systems, which avoid that distortion.

Why use rolling shutter then? Mainly cost and complexity. CMOS sensors are much cheaper to manufacture and integrate, especially at the high resolutions common in phones. For devices aimed at still photos or relatively static video, the drawbacks of rolling shutter are often acceptable compared with the savings in cost, power, and design complexity.

So the “advantage” of rolling shutter itself is not image quality. The practical advantage is that the underlying sensor technology is affordable and suitable for mass-market devices like smartphones.