The intricate crop circles that appear over night are not made by humans.
Then, pray tell, who - or what - do you think made them? And why? And any evidence for your belief would be very appreciated. We already know that humans exist. We know that humans like to create art (and many of these are clearly pieces of incredible art!). We know that humans like to play hoaxes on each other. Put all that together and it is obvious who makes them and why.
For alternative hypothesis, you would have to first prove that non-human intelligences capable of making them exist. That has not been done yet. And even if such a thing did exist, you’d have to prove they are here. That has not been done yet. And even if they exist and are here, you’d have to prove that they made the circles. That has not been done yet.
So on my side, I have every bit of evidence already clearly established. Your hypothesis is all up hill with not a shred of evidence…yet. If you have the evidence, present it.
Personally, I find it asinine that any advanced non-human intelligence that could travel light years in space would only come here to flatten some plants in a farmer’s field. Why not just land on the White House lawn and announce they are taking over - which is what would be most likely from such advanced creatures. We would be like ants to them. We don’t make pretty pictures for ants to marvel at. We kill ants we see in our homes and don’t even notice their ant hills as we crush them to put up our houses in the first place.