"Fly the aeroplane as per POH and do NOT add ANYTHING for gusts, wind, people in the back, plagues of frogs or anything else UNLESS the POH so advises!"
If approaching for an uphill landing, on a 600 altitude hill top strip, with wind gusting 28 knots at a nearby almost sea level airport, instruction for how to crash.
Inertia will tend to maintain speed of aircraft relative to the ground.
Windshear will lead to airspeed loss. Inertia will have to be overcome to accelerate the aircraft, relative to the ground, to avoid stalling.
The POHs I've read do not give specific instructions for difficult strips.
As regards excess airspeed, I agree.
This month, I tried the effect of coming low over the fence, but with 70 kts, on a flat 700m runway, in flat calm. Without using brakes, I used all but about 30 metres.
But approach and landing technique have to be adjusted for runway and for weather, as well as for aircraft