I couldn't agree more!
Where I work as the IT Manager we have a "Full" Active Directory network.
Nothing is SBS based at all, so of course we use the various tools to manage everything.
Wizards are rarely used etc.
Just recently I had to setup a satellite office and they were going to be initially using a seperate SBS based setup.
It had been a while since I'd used SBS but I really thought that as I knew my way around a full AD Domain I really didn't need to bother myself with SBS Wizards.
However it isn't a case of knowing what you are doing or knowing your way around, it is more the case of what SBS is expecting.
SBS is designed to make use of Wizards at every opportunity and if you stick with them wherever possible it just means things rarely go wrong.
I actually spent an extra day setting up this site because at the end of day one I decided to totally scrap what I'd done and start again - this time using the wizards.
End result - 100% stable system.