Let's take Ind-Pak series for example. T20 series was nothing but an appetizer and our last T20 was sort of a desert. That's how it's still perceived as when it comes to international cricket. In the case of domestic T20 leagues, they are just a cash cow. The passion there is not enough.
ODI WC win is still considered to be the ultimate achievement more than T20 WC win for a reason. Just ask Tendulkar.