This stupid comment bothers me as it only represents FUD. How does Ubuntu (or any other distro) prevent you from tweaking your system, or being a so-called power user. Give me a break.
Last time I checked, the Ubuntu repo's had over 21,000 packages. What more do you want, and what does the repository have to do with it in the first place? What did you think would happen when you enabled more repos? The distro is supposed to automagically turn into Gentoo or "Enterprise Ready(TM)" ?