Kiritz argued that dusting works against the constantly-evolving metagame of Magic: you could destroy a card that feels useless now, but might become a format-defining staple six months later, and that would "feel bad"
Then you get dumpstered by recursion, reanimation, or a value engine that keeps looping the same threats until your removal spells start feeling like polite suggestions
No player will get priority in between the creature entering the battlefield and being sacrificed
A thousand years of growth, harvested in minutes
Things like value, disruption, information, and options, all also contribute to the power of a card
No one is interested in sorting through a collection with 100 Squires in it