I stand corrected on the use of speedbrakes. Indeed that is the way I fly gliders on approach, but I thought I might be translating powered techniques onto the glider. A better example is a powered airplane on final, high and a little fast. Throttle is already at idle and flaps are full. Too late to sideslip.
Choices are to land long or land fast.
I maintain that one should land fast, maintaining the aiming point.
Of course it might be necessary to hold off in the flare until the speed and attitude are acceptable for touchdown, but changing the touch down point should not be acceptable.
There is only one control available and only one that needs to be used.
This is not meant to cover a gross error, when either a go around or a changed aiming point would be better.