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From being able to call your family from anywhere in the world to the most critical systems, tech workers are the reason that quality of life is so much better today than it was, say, pre-internet.
The affordances provided by the smartphone alone are an example of this. How is this not obvious proof that tech workers have fundamentally changed the world and improved QoL?
As far as you or I go specifically, reality does not need either of us to actually exist. Plenty of folks still around without the two of us.
For numerous health metrics a slower pre-internet life was healthier. All the technological churn has had long lived impact on environment that will make life worse in the future.
Keep cherry picking.
We've been burning hydrocarbons to keep warm and move around long before tech. But the future of energy (and thus of our civilization) will come from tech, not from looking back at burning wood and whale oil. See renewables, fusion and even nuclear.