Rather than not being available, I bet WDW is just not releasing all those rooms yet. Given that this is the least desirable view category (and cheapest), they are probably also releasing woods and courtyard views earlier to get as many of those booked as possible.
However, I would imagine there are only a handful of standard view rooms. WL is laid out in such a way that the vast majority of their rooms offer either woods or courtyard views.
FWIW, I booked a Woods view room at WL for this October in May. I could have done it as late as August, apparently, as I looked then to make sure I couldn't come up with a cheaper reservation.