How do you reach that conclusion? We’re all just bits of matter, assembled in various shapes and configurations.
Because… inert matter doesn’t make decisions…
How are you evaluating happiness absent existence? Hell, how are you evaluating happiness, period?
As long as you accept the premise that some people are happy and some people are unhappy, I don’t think measuring it for precision matters.
Are you arguing a given child would be better off inert? Are blindness, deafness, and paralysis virtues?
They wouldn’t be a child if they were never born to begin with.
All of your premises are detailed extrapolations where immortality goes wrong and doesn’t actually argue against the core issue: I simply do not want to die. I never will.
Its not that I want to live because life is wonderful. I want to never have to face the horror of impending future non-existence.
Like, I could go into some of my specific counter points to your premises. The people I care about extends beyond to people I do not know and it extends even to people I do not even like. And that I’d happily accept never having children be born anymore. That obviously the heat death would need to be somehow mitigated, etc. but this is just arguing over pointless detail.
These details don’t fundamentally matter. I do not want to die.