Why are Jupiter and Saturn among the eight planets in the solar system unsuitable for human habitation?

Jupiter and Saturn are gas giants outside the solar system. They don't have solid surfaces like rocky planets like the earth. There is only an endless atmosphere above, and human spacecraft cannot land on it at all. For example, NASA's Galileo spacecraft crashed in Jupiter on the afternoon of September 2 1 2003, American time. Like a meteor on the earth, it was violently rubbed and burned with Jupiter's atmosphere and eventually turned into gas. The farther down, the higher the temperature and the greater the pressure, and the magical physical phenomena of hydrogen and helium will appear. In addition, there is lightning and thunder on Jupiter. In some places, the wind speed reaches 400 kilometers per hour, and it is impossible to survive. Moreover, Jupiter has a strong magnetic field, and the surface magnetic field intensity is 3- 14 gauss, which is much stronger than the earth's surface magnetic field. Moreover, Jupiter has super radiation, which is also quite unfavorable for the survival of living things. And because it is far from the sun, the temperature is also very low.

As for Saturn, because it is also a gas giant planet, it has no surface. The air velocity near the equator can reach 500 meters per second, which is much larger than the wind on Jupiter. The temperature is also lower than Jupiter, and other sexual characteristics are similar to Jupiter. In a word, gas giant planets like Jupiter and Saturn are not suitable for human survival.