What's the simplest thing humans are too dumb to grasp?
You ever see a dog that's got its leash tangled the long way round a table leg, and it just cannot grasp what the problem is or how to fix it? It can see all the components laid out in front of it, but it's never going to make the connection.
Obviously some dog breeds are smarter than others, ditto individual dogs - but you get the concept.
Is there an equivalent for humans? What ridiculously simple concept would have aliens facetentacling as they see us stumble around and utterly fail to reason about it?
Most of us also ignore that 'the world' is a model in our heads that we've created with our senses. Some may make better models than others. But what does 'better' mean? Stubbing your toe less, getting sick less? Sherlock Holmes?
Also 'the world' is very complex and constantly changing. You're either revising that model or, at some point, you're living in the past.
I kind of feel the opposite. Most people I know is wary of "destroying nature".
I think meh. It is just getting streamlined. We are getting for the next phase of human civilization. We are more like an organism with white blood cells and well separated and controlled compartments of bacteria filled sacks. It is bound to get more homogenous.
Higher civilization means the meaning of biodiversity will change domains.