Now, now, I wouldn't generalize so widely. In my (perhaps) limited experience, connecting with a sub is akin to (at least as it's described) having a child. Regardless what your imagination or fears may have been prior, there's no such thing as "prepared"... and yet somehow, one's nurturing and protective instincts seem to arrive right on time. The first time you gaze down into the dependence of those wide, innocent eyes... something just takes over.
Of course, unlike with parenting, not everyone is naturally suited to the responsibilities of a dom - and not everyone would want to be. It may also be that sometimes forming that connection is overlooked by the overeager, and maybe that's the more common failing of youth's impatience. Nonetheless, don't make the mistake of writing off all us 20-somethings.
Will we mature, and improve through experience as we age? Hard for me to rule it out until time tells me. But I expect there are just as many disappointing, would-be doms in the middle age bracket.
Anyway, I'm sorry you've given up still unsatisfied ann, but I hope you'll keep an open mind; we're not all uneducated, or unsophisticated, or unrealistic.