they take better images of objects light years away ...
Hubble picture of Jupiter, mean radius = 69911 km
By contrast Uranus has a mean radius of 25362 km.
The features are much larger, that's why they look clearer.
Hubble picture of Spiral Galaxy M100. Left from the Wide Field Camera 1, right from the Wide Field Camera 3. Note the significant improvement in point-spread function. You call that "clearer"? Those dots are whole stars, and not little ones like our Sun. Planets don't even show up.