If VB wins a cup with its youngsters someday then its ok but it still depends mainly on its foreign players like Brako,Glinka,Fürst.
Volleyball in Turkey doesn't have a long history, it is not a wrestling, weightlifting, etc. which are already settled, with long history.
Raising a tree, say walnut tree, and getting its fruits take some years. Raising a sport culture from youth to seniors take longer time. Ajax-like academies in football weren't built a decade ago. Have we been hearing volley success in Turkey till a decade ago? No. We have started to hear some successes also at NT levels just in last few years and last year, it is in their peak level when junior NT won Euro and World championship. Where were those youngsters grown? Mostly at Vakif academy and then Ecz academy with some little contributions from other clubs.
Senior A-team, also at Vakif, with some world stars is built specially for young girls, to attract them to volley sport and this is valid especially for academies like Vakif. Hence, we see Glinka, Furst, Brako and Saori too at Vakif senior-A team. What about Gozde? and her twin? They too are products of Vakif academy and the youngsters of Vakif have already started to pressure on senior level players around the league. In 3 years, if you see a team in Turkey with all those players raised at Vakif become a Turkey champion, don't be surprised, or, if they are unable to find places at senior starters positions, don't be surprised if we see them at other country clubs too.
By the way, maybe not Brako, Furst, Saori yet, but, Glinka is not considered as foreigner anymore, she is not different than any Turkish player at Vakif, Vakif is her home too.