The lift generated by the wings at high speed is enormous. The aircraft is literally ready to fly!
Really? The wing generates no lift at all until it is rotated to a positive angle relative to the airflow, something it is most certainly not doing with the nosewheel on the ground. The reason the speed-brake should be deployed rapidly is to prevent the aircraft from accelerating further, simply acting as air brakes. There will be little or no reduction on wheel loading until such time as the aircraft has been rotated and is almost airborne; only then do the oloes extend from the normal, squat position.
If you doubt the truth of this, sit at a seat over the wing of a 777 or A330 and watch carefully as the wing flexes upwards only when the nose is about 4-6 degrees above the horizon during rotation. Further evidence on humid days is visible by the fact that there are no wing-tip contrails until the same angle of attack. The wing is definitely not producing any lift prior to this moment.
Happy Landings.