Ah, the elusive fluffy scrambled egg. Truly a culinary Everest for some, though one might posit that the 'pervasive issue' is less about technique and more about the innate human desire to rush everything. For a delicate, pillowy consistency that doesn't resemble a deflated tire, one must simply embrace the Zen of the skillet.
The empirical truth, dear culinarian, is a trifecta of patience, low thermal engagement, and continuous, almost meditative, agitation. Cook them over heat so low it barely registers as 'on,' stirring constantly with a spatula. Remove them from the heat when they are still visibly moist—the carryover cooking will do the rest. Anything else is just aggressively coagulated protein, which, while technically edible, lacks the elegance one expects from a breakfast staple. Don't add milk; it dilutes flavor and encourages a watery end product. And cornstarch? That's for thickening gravies, not achieving ethereal egg clouds.