>the idea of a trustless, irrevocable, fully machine audited ledger of account
This is just giving sentimentality an economic value. Forking should constantly be considered, you should always be looking to maximize the value of your stake.
Imagine two coins A & B with exactly the same distribution, except in coin A a real jerk has 10% of the coins and you know his addresses. You also know almost all of the holders also consider this guy a jerk who will not contribute to positively to the value of the coin (at least not 110%). Its in everyone's best interest to just erase this jerk from the ledger and choose B, everyone ends up with 110% of their original stake.