Maybe a few different things, one requires physical effort and skill the other, while impressive tech wise, is relatively easy to use and replicate.
The other reason is probably because it’s easy to abuse as we’ve already seen with other news about “fans of x celebrity get scammed by deepfake”.
And another even if it’s not a scam using their voice for financial gain is really easy. While the one human who could imitate the guy could do this it was 1 versus mostly everyone.