Better question, when have i said that it wasn't? I said that what freeza resisted is completely different from what sans does
It shouldn't and whoever says that it is is wrong, that depends on the type of the resistance
The people who say it for every soul resistance are wrong, simple as that
you know that i aknowledged this already right? It soul erasure, it destroying the soul via EE, what the undertale people do is attack the soul directly and destroy it with AP, something completely different then what hakai does, being "destruction" is very broad and doesn't mean much in this, does resisting deconstruction allows you to resist getting destroyed by superior AP? seriously, how is this difficult to understand? The hax are doing different things to reach a different result, therefore resisting one method doesn't make you resist the other methods
Because sans ignores durability even without the soul thing, that is how he killed flowey, a souless being, multiple times, and also shown when he ignores frisk's armor and defense stat in their battle, why do you think he is the only one who didn't got affected by the soul hax downgrade crt for the verse?
Does resisting deconstruction makes you resist a normal punch from someone 10000000x stronger thab you? Because that is the difference between what hakai is and what sans does