theory on odds/probability?

Here is a little scenario that proves that 2 outcomes, one with a greater chance of happening, still each have a 50% chance of occurring each time.

Say there is a roulette wheel containing 70 black squares and 30 red. Somebody spins the roulette wheel 100 times and records whether the ball landed on black or red for each spin. It is your job to guess the outcome of each spin. Get them all right and you win one million dollars. Naturally, this is impossible to do, but hey, your willing to give it a shot. You begin by figuring that 70 of the spins ended up being black and 30 ended up being red. You don't know this for sure, but the odds say that this is most likely what happened. Now, how do you choose which ones are black and which are red? You have nothing to go on. You cant say that spin 46 has a better chance of being red than 76 or that spin 23 has a better chance of being black than 57. The only thing you can do now is choose at random, which 70 were black and which 30 were red. Now, because you can't say one is more likely than the other at being a specific color, that means that each one has an equal chance of being black as red. In other words..... Each spin has a 50/50 chance of being black as being red!

In conclusion, odds of black vs red for one spin: 50/50

odds from 100 spins: 70/30

This goes against how most people view odds, I understand that....But just think about this and tell me what you think.