Random erratic extruder movements at the beginning of the print

For standard hardware and a properly setup system, this setting is never needed. If you get such an error then you have some issues in your setup and Klipper is warning you about it. See Move exceeds maximum extrusion (AA mm^2 vs BB mm^2)

You can set what you want if you like the results. I’m just pointing out that the NEED to set it to such low values is a strong indication that something is wrong in general.