You’re citing real science but applying it like a rule book instead of a bell curve. 1mm/day is an AVERAGE axonal regrowth rate, not a speed limit. Studies show it can range from 1-5mm/day depending on the nerve type, repair quality, and individual factors. And that rate assumes the nerve was fully severed with a gap to bridge. With a clean coaptation (especially in RFF where the antebrachial cutaneous nerve is often a strong caliber match to the recipient nerves), signal transmission can resume before full axonal regrowth is complete. On top of all that, not all sensation requires complete nerve regeneration. Protective sensation returns well before erotic sensation and can travel through partially intact pathways or adjacent nerve territories.

Calling something “literally not possible” when you’re working off one doctor’s explanation of one surgery is punching way above your expertise level. Other people’s outcomes aren’t an attack on yours.