No, they are just misinterpreting it. You have to have the middle nute to promote system growth and vitality. This vitality will lead to more flowering...makes sense, right? However, to push a bud into becoming oversized... (the goal)...spiking K is essential.
The 10-52-10 is a great way to start plants off. At that point extra N will give the veg a push, but the building blocks for flowering need to be set early. that's where the 52 comes in to play.