That's just the point. If the Earth would have just popped out of nowhere for no reason, I doubt that there actually would be a magnetic field around it that we humans could put to so much good use!

[Okay, I'm not even going to address the obvious here, because there is just so much wrong with this that my mind cannot fully comprehend, but let me ask you this, Dozer my boy, what exactly do you mean by humans putting the magnetic field of the earth "so much goo use?" I mean, sure, we have compasses, but navigation is only very slightly more difficult without them. Using the stars to navigate worked fine for a longass time.]

Tell me, do other planets of the solar system have those magnetic fields? No. Do the magnetic fields of the Earth serve any purpose for the Earth? No. There is a very big chance that they were put there so we can use them. Cause if we could not, it would not serve any purpose at all. Things of such a high calibur that exist with no meaning at all? Sorry, I don't by that crap.