It calls attention to the ethical implications of using a part of someone else's personal identity without their direct involvement.
As far as I know, most countries are lagging behind when it comes to updating legislation to set binding rules around that.
This assumes existence of a license agreement or likeness/right of publicity law that prevents unauthorized use. But this is far from the case.
Companies have shown willingness to use actors’ voices to create synthetic voices without permission, compensation, or regard for their livelihoods. [1][2][3]
[1] https://animehunch.com/popular-japanese-voice-actors-band-to...
[2] https://www.theatlantic.com/technology/archive/2024/05/eleve...
[3] https://www.yahoo.com/entertainment/morgan-freeman-calls-una...