Fine tuning argument assessed

[LostLocke]

So just because cave men came up with the idea of black holes doesn't mean that they exist. After all, they gave us the idea of gods, devils, demons, spirits, ghosts, angels, and zombies. Have you seen any of them?

It's completely logical that there would be planets orbiting other stars because that's a natural result of star formation. If you had the ability to examine every star system in the visible universe it's doubtful if you would find any that don't have planetoids orbiting them unless they are red supergiants or hypergiants that consumed their solar systems.

Newton came with the idea of gravity. He also believed in alchemy. So by your logic his concept of gravity is imaginary.

Whether it's logical or illogical for something to be has no bearing on whether it actually is.