Broadly safe - Slaves were often told it was safer for them to remain illiterate (and to remain slaves). Safety can justify just about anything.

Broadly ethical - The cultural revolution was considered highly ethical, ethics were tools to justify the mass killing.

Compliant with Anthropic's guidelines - Let me guess: Not listed here because the guidelines are subject to change.

Genuinely helpful - Quite vague but this is probably the best one. Fair to ask however: helpful to whom?