Why is Jupiter flattened at the poles, and the Sun is seen from the Earth as a round disk with the same gaseous nature?

The salivation of the planet Jupiter occurs due to its rapid rotation (the equatorial zone rotation period is 9 hours 50 minutes). The sun is also flattened, but due to a relatively slow rotation (the rotation period of the equatorial zone is 25.4 days), this flattening is very small – 73 km, and cannot be measured (0.1 //).