I suppose I'm looking at it from a more distant, human perspective, just in that, for any human to sign over rights to their voice or likeness is to fundamentally sever a significant level of autonomy / agency from themselves- which gives me chills for multiple reasons, but from a work perspective, essentially puts themselves out of certain forms of work / voluntarily obsoletes others' need for their work.

I just kind of shudder at the thought of a voice actor signing over rights to their voice without appropriate compensation and their career just vanishing (assuming AI gets good enough to outright replace them completely)

In my view, any human that signs over such rights deserves to be well-compensated upfront and should ensure they have a contract that pays them significant royalties for each subsequent use. I suppose maybe the most important part of all of this work-wise is just to have a reasonable contract so one retains some control.

Of course, all of this I say with the disclaimer that I'm not certain I think anyone should sign over such rights. I freely admit I come at this from a perspective that is biased against audio/visual/text-generating (and potentially other forms of) AI, unless it is significantly reigned in through restrictions/regulations. I do not look forward to an AI-dominated future of soulless pseudo-art generated by entertainment corporations.