I'm having a seriously difficult time agreeing with that. If a player can't take a few minutes to clear the tutorial, I don't think you should expect to receive the rewards within just for clicking a "skip" option.
Where does it end?
It begins and ends at the mandatory tutorial of course. But an optional tutorial should be ... optional. Passing up free loot is not an option ;P
I think that's oversimplifying it. The entire way up to the town gate could be considered a tutorial, as you're presented with tips and instructions nearly every step of the way. Do we request an option to skip all that while still receiving all the rewards and XP? Why not just let us start in town at level 2 with a heap of crafting resources, gold, and nice low-level equipment?
I'll say it again, this particular request boils down to "I don't want to spend the time doing this, but I still want the stuff", and there are quite a few areas in this game that logic can be applied to. The tutorial needs to offer a reward to players that participate in it; it's not fun or fair to them otherwise. "Participate in it" is a key part of that phrase, however.
The tutorial dungeon is an option, like many other options in the game. Nobody said the choice had to be easy, though. Just like it's not easy for me to forgo stripping the marketplace bare for free gear - it's a choice I have to make.