It’s a dilemma; most Windows and Mac users would benefit from that kind of locked-down, idiot-proof format. Even having the choice of multiple repos is too much for them. So while I personally hate it, that’s what most people (i.e. non-Linux users) want and need.
I recommend Ubuntu as the beginner distro for everyone, but with the hope that they eventually drop the training wheels and switch to Debian.
What makes you say that?