It is a fluke that the earth just happens to be supportive of biologic
It's not just the thousands of things regarding Earth, it's the universe and the set of about 40 cosmological constants which had to be precise to amazing caliber in order for the hydrogen and helium to fuse and create carbon and stuff, for planets to exist, for anything material to exist.
You are now talking about a "fluke" of the following magnitude: If you went to the casinos and played roulette on a wheel with 10^80 numbers... that's 1,000,000,000,000,000,000,000,000,000,000,000,000,000 numbers on the wheel... little ball goes spinning around and you land on the one number that pays the jackpot.... and you do this 40-50 times in a row. Never missing the jackpot... and you have the basic "fluke" you're talking about. Realistic?