There is quite a bit of information about this pack at this link.
https://simsvip.com/sims-4-get-famous-guide/
There is an option to turn off Celebrities. I haven't done it yet, but there should be a way to turn a celebrity into just a regular non-celebrity sim.
https://www.reddit.com/r/sims4Cheats/wiki/famouscheats
There are also mods that deal with celebrity issues as well.
https://littlemssam.tumblr.com/post/180477705418/celebs-undercover-get-famous-this-mod-adds-a-lot
https://www.deichschafblog.de/s4/mods-fuer-werde-beruehmt/
Hopefully, some of this information will help you decide on what you want to do. :)
