my instructor has had me try to land on the left half of the runway with the piano keys representing a row of trees
Although better than nothing it won't prepare you for the ground rush of green stuff whizzing under your tyres a couple of feet below you. Which is normally when the pilot pulls back and cocks it all up.
Just to add my view is the same as above. Nothing wrong with putting it down anywhere you like for a reason. With the absence of any reason there really is no real excuse for not using the runway full length.
I always wonder sometimes with these touchdown zone landers touch and go's if they have a clue how much room they actually need to perform one and give them least risk.
Touch down on or near the numbers power up and your airborne before you are even at the touch down markers. With loads of runway still ahead of you more than if you had just done a normal TO. Even with only 1500m of runway you would still be able to land on before x wind.