Did you actually watch the videos you posted the links for? Especially when looking at the first, very good video, you would notice that
1. the 'split second' on ground lasts (at least) 4sec
2. that the nose is correctly lowered below the touchdown attitude during the touch & go.
You don't want to become airborne (and out of ground effect!) in a semi stalled aerobraking attitude.
Don't know why you would be commited to a full stop landing once the nosewheel is on the ground, since this is the way you are doing touch & gos on many jets and e.g. with most, if not all airliners.