Yeah but you arent walking around the citadel or the normandy with your gun drawn like an idiot, which I what I assumed he was referring to.
Of course those places are understandable. But I remember in ME2 there were areas between fights where I could explore the beauty of the land with wider FOV and switch back at the check point were battle began anew. This time around I assume the level design or enemy placement have changed somewhat to accommodate for this awkwardness.