I never made any such assumption or said any such thing.
You calculated the average damage a 14th-level sorc does in a 2-round nova based on the assumption the target doesn't have Legendary Resistance. What exactly are you blowing all your biggest resources on? Is it the traditional Nonthreatening Cube of Infinite Hit Points that lives in the middle of every white room on the internet, or is this something you regularly see Sorcerers do in actual high-level games?
You're making up my arguments in an attempt to not be wrong. That does not work. Focus on what you said and why you said it.
What I said: 14th-level sorlocks spit out a lot of damage using various combinations of EB and Quicken Spell, to the point they greatly outshine a straight-classed Warlock, due to virtually never running out of resources, resulting in the support class focusing his buffs on the Sorlock, and the straight Warlock not openly wishing he'd built a different character.
Why I said it: Saw it happen at the table across a fair number of sessions.
You clearly didn't recognize that you need to use a bonus action to move Hex onto a target, whether as a cast or as a movement of the effect following a prior target's death.
Yes, I admitted I overlooked this, and that you were right, but you kept on insulting me for some reason. So let me say it clearly, so you can scoop up your internet points and redeem them for prizes: clearly, the Sorlock at my table never used Quicken in the same round that he placed his hex. I fully admit that in Princes of the Whiteroompocalypse, when the party faces the Nonthreatening Cube of Infinite Hit Points in the final dungeon, it would be better to be a straight Sorcerer than a Sorlock.
In Citadel of the Void Dragons, however, it was pretty clear what the advantage of being able to spew out 4th-level damage virtually for free while having nearly a full complement of a high-level caster's spells was.