I would clone my own and do things like create scripted tutorials/presentations and audio books.

I do not personally prefer it, but a non-trivial number of individuals like video/audio presentations over writing.

The possibility to continue to sound like yourself after permanently losing your voice (e.g. from motor neurone syndrome) is one. Perhaps almost the only one.

Video game mods are the first use case that comes to mind for me. If you want to add new voice lines for a character, your options are:

1. don't (keep it silent);

2. recruit the original VA somehow;

3. recruit an alternative VA (who hopefully sounds close enough to the original to not be jarring);

4. splice voice lines together from existing voice lines; or

5. use text-to-speech.

Voice cloning is just Option 5 but with results much closer to Options 2 and 3.

At my workplace, a colleague in another team used an AI tool to voice/video clone my companies CEO, CRO and CTO (I assume with their permission) and created a mandatory 30 minute training video that they expected us to watch with these monotone fake company leaders doing the presentation. It wasn't even a joke.

Voice acting for procedurally generated games?

Selling a voice profile for procedural/generated voice acting (similar to elevenlabs "voices") of a well-known person or pleasant sounding voice could be a legitimate use-case. But only iif actual consent is acquired first.

Given that rights about ones likeness (Personality rights) are somewhat defined there might be a legitimate usecase here. For example, a user might prefer a TTS with the voice of a familiar presenter from TV over a generic voice.

But it sounds exceedingly easy to abuse (similar to other generative AI applications) in order to exploit end-users (social engineering) and voice "providers" (exploitation of personality rights).

If you want to make a podcast but don’t want to spend the time reading out the script and then painstakingly audio engineer every part of it.

Resisting involuntary biometrics.

If you're in the USA, your credit card company captures your biometric voiceprint without consent or even notification when you call customer service. This technology makes that pointless.

In Descript it is used to patch words in videos.

Last year I proudly said it was "two thousand and five" during a video take, and didn't notice it at the time. I was able to add the "twenty" using Descript.

Parody, but it toes the line of evil in being fake.

Black mirror episode

I'm pretty sure Caller ID is forgable and would lead to false negatives.

It is significantly better.