Your observations may be overlooking what is really driving your perceptions. The support forums at wordpess.org are free of charge, supported solely by community volunteers (as far as I know), whereas full access to the support forums at StudioPress, is available by purchasing their products and services. While there is absolutely nothing wrong with that, I think you may be overlooking the glaringly obvious differences between the two.
StudioPress: Commercial theme designers with an outstanding reputation, who offer access to complete support for their product, once you make the decision to purchase that product. - That sort of obligates and motivates them to maintain support. They get paid. :-)
WordPress.org: Free themes, plugins, and the WordPress software, that you are pretty much free to do whatever you wish, with. For Free. The support is free. It's provided by those who try to give back to the community that provides the Free software and framework upon which so many people have built their own businesses, and are actually making a living from. (see what happened there?)
Sometimes it can be difficult to get answers to very specific topics or situations. That's the nature of requesting assistance from volunteers. Not all are going to be technical experts on your particular subject. On the other hand, when you have a question specific to a product you purchased for use with WordPress, and you ask the experts you paid to support you when you purchased that product, then I think you can expect a different result. That's their business. You buy, they supply. They're actually motivated to keep their good name by providing you a level of service one would expect when purchasing their product.
I'm not saying your sentiments are entirely incorrect, I'm just trying to highlight the possible errors in your comparison. Apples and Oranges.
On a personal note, I think the last half of your post appears promotional and self-serving. Almost seems like the whole point of your post, when measured against your topic title.
Good luck to you!