[stonetools]

Part of the reason the indie craze is so centered on genre fic, is that publishers have often shoved genre fic to the sidelines. There's never been as much of it as genre fans wanted, and it often ran out of print quickly. Now, the market is glutted with genre fic because there is immense customer demand for it--and finally, the authors have a way to fill that demand.

If there's not swarms of literary fic being released on the indie marketplace, it's because there's limited demand for it. Customers are not lining up to throw money at lit-fic authors.
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The reason why indies write genre fiction is because lets face it its rather formulaic and easy to write as in:

Jets blasting, Bat Durston came screeching down through the atmosphere of Bbllzznaj, a tiny planet seven billion light years from Sol.

Lets apply this formula to fantasy:

Cautiously, Bethe Derlanga pulled at the reins of her dragon and dismounted at the gate of the keep of Bbllzznaj, stronghold of the Dread Lord Saureg

Crime/mystery/ thriller

Brakes squealing, Biff Daniels pulled up at the gate of Don Pelicano's mansion

and so on.
Romance?

Betty Dunn sighed in delicious anticipation as the fangs of her vampire Highland lover touched her throat

You plug in whatever variations you want (LGBT? BSDM?) and there you go. That stuff is relatively easy to write (but hard to write really well) and needs no research or in the field investigation ( a la say Murio Puzo's The Godfather )which is why the bulk of indie writers produce it . If you happen to hit on the right variation ( Fifty Shades of Grey) success is yours: if you flop, , you don't lose much except time spent to writing.