there is not a single thing that could wipe out a deep sea habitat that wouldnt also wipe any space colonies. but i dont see anybody arguing for that, despite being far more achievable and practical. also, there is no feasible way for space colonies to be self sufficient anywhere in the near future, so wiping out earth also wipes out space colonies relying on it for supplies. this argument aboOt survivability is absurd.
that’s not how that works, we cant regrow (most) vital organs (liver says hi) because of “engineering problems” not because evolution is random. we personify adaptations to understand them, it can lead to issues but yours is a massive overcorrection.