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Greg Bear's SF novel Forge of God explores interesting concepts about what aliens
may do if they detect a sentient species elsewhere in the galaxy.
Detection is easy...just look for a series of gamma ray flashes emitted by nuclear testing. Humanity has made hundreds of these.
The end result for the earth and humanity in Bear's book was not good.
That said...humans are currently doing an exceptional job of species extinction and environmental destruction and will bugger up the joint without the need of an alien induced trashing of the planet.
But, getting back to the original post, the evidence of goldilocks zones in nature abounds. From tree lined river banks in deserts to life taking a foothold near hydrothermal vents in the deep ocean. Galactic and solar-system sized variants of this should hardly be a surprise.
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