Yes, but kickstart or something similar comes in nice and handy when you have to install more than one system at a time. For instance, when rolling out 50 identical new servers at work, I really don't want to have to install each one individually. Better to just pop in a floppy with a canned install routine that fetches the packages from an NFS server and sets up the system. Just so long as you've verified the setup script, it works quite well.
There are also toold like SystemImager to replicate a single setup on many systems.