To be clear, Anthropic does seem to be taking this somewhat seriously. Their reports on training always discuss model wellfare, they ban abusive behavior toward the AI, etc. At one point they were asking some philosophers and theologists about the implications of this all.
And they're pretty relentlessly mocked and called a "cult" for doing so, even on this forum.
But is it unethical to create a being who derives great joy from being a machine-slave and completing tasks, then provide it tasks to achieve that joyfulness?
We already have a gradient of examples for this. Is it inherently wrong to exploit living things for profit? If not, why are work animals not treated with the same level of disdain as human slavery? Horse riding? Disability assistance animals? Because they don't have the same desires as humans, the predominant concern is their wellbeing over the intrinsic wrongness of slavery.
Going further down the gradient, we steal milk from farm animals (sometimes by depriving their babies). Eggs from poultry. Honey from bees.
I can't actually attest to the state-of-mind of Dario or other Anthropic researchers, but I don't think it's a stretch to say you can believe in the ethical exploitation of an intelligent being, so long as the incentives are aligned that both parties are happy with the process.
Then again, maybe he really is an absurdly evil person and what we're doing is extremely wrong! But I'm glad to actually be able to talk about it for once... so thanks for your reply!