I was reacting to your original post which implied that speculative concerns have marred EA the movement by pointing out that EA the movement has had close ties to speculative concerns since the beginning. It's a large, complex group with many on-going projects. LessWrong's top charities are still meat and potatoes human development in the 3rd world.
I have no doubt whatsoever that EA the organization, LessWrong, and MIRI are all instrumental in EA the movement. But my understanding, including from actually reading just about everything Singer's ever written, is that the applied ethical groundwork for EA was laid at least a decade before LessWrong or MIRI arrived on the scene.