I'm going to close this thread as really all you need to do is take a good look around the aliens and ufos forum to find out what people think about
if and why aliens may come here.
I've done an ATS search for you (you can find a link at the top of the page if
you wish to do your own search.)
here are the results for the question
why do aliens come to earth
perhaps you could check some of those threads and add some of your thoughts to them
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