That’s a daft statement to make (theirs, not yours). Backlash reapy optim changes the entry direction of cuts so it matches the exit direction (I think), meaning that the mechanical backlash is on the same side at the start / end of the cut. The fact that it’s called ‘backlash repay optimize’ and backlash is a purely mechanical problem should tell you that it is a hack to fix a mechanical issue, albeit a clever one.
The latest version of LightBurn has a ‘Hide Backlash’ option in the Optimization Settings window, but the results aren’t as good yet as those from RDWorks. I plan on revisiting this soon to see if I can get better results, but I have to loosen the belts on one of my systems to test it.