Are we really destroying ourselves?
Looking at the opening question again...
I believe it is all relative but the relativity is not unique for each person.
In other words, one person may have both a yes and a no answer depending upon what they are considering.
In one sense, yes, we are destroying ourselves.
Change of any kind is a destroyer as it creates something new from something old. Sometimes the change is for the better, sometimes it is not.
In my hometown in the 60s, fewer people had cars, most people used to walk or call a cab. "Town" had all the stores in close proximity (walking distance) to each other. We had a lot of hotels. With three major factories and two smaller factories we had a lot of 'in town' business.
By the late 70s, those three factories closed down. More people owned cars, less people came to my town for business. Stores closed down, hotels closed down, restaurants closed down.
By the early 80s, strip malls started popping up out past the town limits.
More people had cars. Even more businesses closed in town. Walking distance was no longer important.
In the 2000s, a revitalization project was started. New businesses started remodeling the structures in town for a new look, new appeal. Many specialized stores popped up, all within walking distance of each other.
Parks and green-spaces were built.
The 'new town' is much more environmentally friendly than the 'old town' but many prefer the 'old town' because it had a charm or presence the 'new town' lacks.
That presence was the people's familiarity with each other.
In the 'old town' most people knew each other or were willing to stop and talk with someone. In 'new town' people don't usually talk with one another, there is no familiarity. People go there, do what they came to do and go away.
Did we destroy ourselves, some might think so, others may not.
Some might think it is the change we needed to survive in the world.
Innovation is change. Sometimes it change for the better, sometimes change for the worse but from any perspective it can be both.
Then there are those who think we are destroying the planet.
We are not destroying the planet.
The planet will persist no matter what we do.
What we are destroying is 'our' ability to survive on this planet.
For most of the planet's life, it would be deadly to us.
For 4.5 billion years before us, Earth was a hostile environment to humans.
Humans are about 200,000 years old. Our civilization is roughly 20,000 years old. Even if we survive another 800,000 years the Earth will be here another 4 billion or so years.
We are infants stinking up the crib with our poo.
Nothing more.