... though if you touch down at 45 knots into a 45 knot headwind you will have zero kinetic energy
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Kinetic energy is of course proportional to Velocity squared so even a 10kt headwind will reduce your landing energy by around a half for an airspeed of 45kt since your groundspeed will be around 35kt.
The point is that the aircraft doesn't have any knowledge of what's going on around it. As an observer you can choose your frame of reference. You can make the maths slightly more complex by using an external reference and including the rotation of the earth (in the UK we have a linear speed of around 700mph because of that) or the speed of the earth round the sun (approx 70,000mph). You could decide that the whole of space was moving relative to the aircraft and that pulling back on the stick forces the earth down.
The key lesson from this long, tortuous path is that close to the ground, airspeed can be a friend. A quick glance at the ASI and timely correcting action with the stick and/or throttle can save your life.