While it might be fun to create a deepfake "nudie" of a celebrity or porn star for one's own amusement, it also allows others to use these apps for a version of revenge porn, which is a real problem.
Many US states have banned the posting of revenge porn when it involves true images that are shared without consent, but only a handful of states (so far) have legally addressed the creation of sexualized, non-consensual, deepfake pictures, beginning around 2019.
https://www.technologyreview.com/2021/02/12/1018222/deepfake-revenge-porn-coming-ban/
The issue is being considered globally as well, as there are other uses of the technology that are beneficial to those with certain physical impairments, and in the arts:
https://digitalmountain.com/newsletter/deepfake-legislation-deeply-complex/
And therefore, it seems that deepfake, in its various iterations, will be legislated and debated for a long time going forward.