You’re contradicting your own argument:
It was never meant to remedy shitty living conditions.
Vs
Ask anyone with disabilities, abusive families, trauma, financial hardship, and generally going though too much shit in life and you’ll find that it was never about a lack of imagination.
This is a contradiction. You are literally picking the antinatalist option because of shitty living conditions.
And of course, the lack of imagination is not whether you can imagine things being better but whether you can imagine things becoming better starting from where we are here and now.
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We suffer because we are able to imagine how things could have been so much better. It is because we can imagine ourselves in a better place
If you can imagine such a place, steelman your argument then, try making it without a premise of shitty living conditions. Pick a convivial world, and make an antinatalist argument from that world. Does it still stand?
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Finally, the argument that says nonexistence might be better is literally vacuous: False implies True. Nonexistence therefore is trivially whatever you want it to be, but not In any meaningful sense.
It doesn’t change absolutely anything in my argument, it remains exactly the same. Antinatalism absconds not only the responsibility to improve the world but even the possibility of a better world existing in the future, it assumes à priori that existence is and will remain insufferable.