Here are a few rope facts:
The idea of melting a rope is to make the fuzzies disappear. When you melt the rope you create a lumpy spot at the end of the fibers.
In splicing, we 'milk' such fibers into the body of the rope to make them go away.
Rope's strength comes from a collection of individual very strong yarns. They are made even stronger by accepting the load in unison when bundled together.
The strength of a standard 16 strand splice comes from what we all call the 'chinese handcuff' effect.
With creating a lump, that paticular fiber is now locked and prevented from moving with the other fibers.
This may create an imbalance in the overall unison of the yarns working together.
So that very lump may cause individual fibers to not work in unison.
Maybe this is why Nick says to just milk the fibers into the body of the rope?
I don't know personally.
Keep in mind skwerl, that Nick's knowledge and skills are based on a knowledge of how ropes work and the materials which they are made of.
Also, I had for years melted those pesky ends into the rope, but on the strength of what Stanly Longstaff taught me, and what Nick is saying now, I simply milk them into the rope, or just ignore them.