I can understand people not being sure if ETs make crop circles because like I said earlier, I’m not sure either.
The people who say that they’re all man made, I think the onus is on you to prove that because that’s far easier.
So until you have footage of English men going into a field to recreate one of those fancy intricate crop circles seen above in one night then you have no proof and it remains unknown who makes them all.
Now you’re just playing silly buggers.
Crop circles started appearing. People speculated as to what they might be. Some people thought it was aliens. Then, the perpetrators came forward and showed how they did it. Crop circles became more and more elaborate as more and more people got on board and improved their skills.
Now, it’s possible that some are still made by aliens. But given the choice between “people did it” and “alien Banksy did it”, one possibility does seem somewhat more likely than the other, does it not?
Because, as I said before, even if you’re not a stone bonker and aliens actually do walk amongst us, spending their time secretly drawing pictures in fields would seem somewhat illogical behaviour for an advanced race capable of interstellar travel, would it not?
This is the god argument all over again, isn’t it. Unless the perpetrators of every single piece of crop art come forward, then it’s technically possible that only most of them are man made. The rest may well be aliens, or fairly equally likely may be a message from god, tasmanian devils, low flying bee swarms, ghosts, rare freak weather formations, grass-spontaneously-lying-down syndrome, or sudden synchronised mole activity.
Or turning that around, even if you really Want To Believe in aliens, there’s little reason to think that they’re responsible for crop circles just we can’t prove explicitly they aren’t. By that logic, aliens could be responsible for everything in the world that we don’t know the originator / creator for. Every piece of graffiti, every unsolved crime, the can of Fanta someone’s chucked in my front garden, junk mail, all done by aliens. Can’t prove otherwise.
Further reading:
https://en.wikipedia.org/wiki/Philosophic_burden_of_proof