Not a pilot, but trained in physics. To a certain extent, what you say is true. However, the aircraft also has inertia, so if the wind suddenly dies, the aircra

Not a pilot, but trained in physics. To a certain extent, what you say is true. However, the aircraft also has inertia, so if the wind suddenly dies, the aircraft doesn't simply surge forward to maintain its airspeed. It is inclined to stay where it is and the amount of air flowing over the wings will consequently drop. Constant wind is easy and can be treated more or less as you describe, but gusty variable wind can and will cause problems.