>i see no reason to use it. making fedora do what it does is easy enough
Yes, people working in tech and with free time can do that, but many don't want to go down that rabbit hole anymore and fiddle with their OS to get it to where Nobara is, and would rather go for something that's already preconfigured out of the box for the best gaming experience where everything is already set and you can immediately start installing and playing games after installing the OS, similarly to Windows is. That's the whole point of these distros.
Then they should be using a simpler distro like mint because an install script doesn't change the fact that it's still Fedora which doesn't target new users.