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I'm with you on all accounts bar one, OP.
Consider the fact that salience is part of the substrate of it all, just like physics.
By destroying the painful fruit of billions of years of evolution, you're damning us to repeat the process in the future.
While we could keep trudging on, and aim for hedonium-wave-like events.
Other beings in the cosmos need saving from the same fate you are lamenting (as am I).
Also, if General Relativity is right, then the universe (being a 4D block of spacetime) will never be destroyed, since it already would've been.