Hiring a sound-alike isn’t taking a job out of the economy for one. The original voice is able to accept the job at the pay rate the sound-alike took usually.
Not to mention impersonators are usually doing the voice according to parody/fair-use
Nobody wants to end people using AI to make Johnny Cash sing “Barbie Girl”, but using it to replace Keanu Reeves in John Wick 8 for instance would be across the line. Recasting the role is one thing, but replacing the human altogether is another.