Dexless DW vs. dexless NW

I make no argument that NWs are better than DWs, but I still don't believe dying in one hit because you lag a lot is a disadvantage at all.

It is to me. It also is a disadvantage for bossing when the boss deals unavoidable damage that requires HP washing to live through. Horntail is an average example because number crunching proved without HP washing the average character would just be able to handle a Horntail hit at nearly level 200. Pink Bean is a ridiculous example (statue damage of course) because it needs unfunny levels of HP washing the the brink about 7k base HP is needed to handle the statue damage safely.