pelos

not sure how helpfull is it, but in the mean time you could lift the curve primitive by the closest normal of the skin, create point there, and added to the hair curve and make it a root.

(I think there is a lift under the groom hair node)

your questions is not about fur/hair
the resample node will let you specify how many points per curve you want,
before resample you could group the short that needs 4 points, and the other that need 8 points, base LENARC.

well if you see the original length of the curve than after the chop is way shorter like the initial geometry changed

I put an example mixing with a vopsop but I wonder how to do all in chops