The incorruptibility of the ledger is the value.
It cannot feed me, it cannot protect me from the elements, I cannot grow food on it and is not a tool to help me create something desirable by the others. Hence it has no value.
That it has no value during an apocalyptic scenario, does not mean it does not have value in the non-apocalyptic times.
In order for me to exchange it for goods, as you described, there must be someone who has the goods and is willing to exchange them for bitcoin. There is no real reason for someone to do so.
It is not an apocalyptic scenario. That’s what 90% if the population fight for, day in day out. Food, protection from the elements, security.
Bitcoin's underlying technology creates the possibility of decentralized governance, starting with currency, which is the connecting link between actors in societies based on economy.
Why such a future might be beneficial to mankind is that banking and finance being controlled by a few has led to errors with systemic consequences.
See the 2008 financial crisis and hyperinflation in Venezuela and Zimbabwe. See the seizure of funds by governments from individuals in Greek and Cyprus, scenarios where many of the affected did not write their own doom (others wrote it for them).
Why is bitcoin more valuable in this regard than any other altcoin?
Just curious, do you think paper currencies have intrinsic value?
A limited supply coin does not guaranty a need to exchange goods over that particular coin and not another.