I have looked all the build videos and almost all the riding videos. They are not using these low bar setups (relative to their height) what many are promoting these days.
I never said factory height is the correct height. Factory risers could be anything from low to high depending on the brand, model, year and configuration and the guy riding it.
This low bar trend is gonna go past after a while, just like those high risers (ape hangers) in the past. People have tendency to go extremes no matter the subject. But many times the answer is in the middle.
Burandt runs 1" lower than Polaris factory low
Turcotte is 2" lower than Polaris factory low
Pulsifer helped ZRP build a shorter steering post to get his low bars shorter than stock
The factory racers have said they run stock height because they have to race stock height in the stock classes. They don't want to change things.