Who says you still get paid?

Everyone who withdrew still got paid, the exchange only lost track of withdrawals because the txid changed so you could withdraw more than you had.

I am telling you your rebuttal is wrong because SegWit was primarily meant to address transaction malleability.

SegWit was a if not the most important part of the blocksize wars and proposed as an alternative to scaling on layer 1. As I see it, that’s literally framing SegWit around lightning.

The very first reason says "Nonintentional malleability becomes impossible." NOT "makes lightning possible".

The very first reason literally includes "makes lightning possible" as a bullet point