Cool, well have fun next time you need to update a setting buried in a config file or verify the results of something you ran. You can write 200 lines of bash that might work (or might not if the user decides they like csh or zsh) or like 3 lines of Puppet and guarantee it's idempotent.

There's a lot more to this than just setup scripts, but if all you need is setup scripts with the occasional update, then by all means just stick with that. Our needs just happen to be beyond that.