that's pretty silly. you're suggesting that in our galaxy we're the only place this happens - what about our solar system is so exceptional, when we see similar planetary formation all over the galaxy?
and also, there are between 200 billion (2×1011) to 2 trillion galaxies in the observable universe - you gonna write them off too?
you have a sample size of one - one solar system. that's it.
seems fucking moronic to be making billions or trillions of assumptions based on your experience.