Have you ever noticed that on the supermarket shelves most of what you can buy are coffee blends? If single origin estate coffees are so fabulous, why would you want a blend?
Why not talk about blending in general? Blending for the press pot or filter machine doesn't need to be as precise. For one it's a far weaker part of the cup compared to espresso and there are rules that can't be broken in espresso blending that work really well in the filter blends. Espresso blending is an art.