It's not just warzones, it's places where they simply lack any financial infrastructure; be it politically motivated, or otherwise.
> 99.9% of scenarios BTC is inferior to what we already have for day to day transactions.
See, again, not true: try making a low cost instantaneous transaction to halfway around the World on a weekend. You can't, its simply not possible.
I understand that for most the affluent in developed Western nations, whom you regards as 'we' it seems entirely unnecessary: but in relation to the total amount of Humans on this planet with those options, you are the minority.
And again, you're limited to what the banks and institutions will allow you to do: you have family in Iran, or Russia trying to flee? Good luck getting anything sent over there to help them out because of geopolitics which ultimately harm the People who are trying to get out of those situations.
I think what most will genuinely never be able to comprehend is just how overly complex, over regulated, and quite frankly how bad the modern payment system is: ACH, Swift, SEPA etc...
Unless you do fintech you will never really get any of that, especially if you are of the aforementioned class of person where the most you have had to deal with with was paying higher tx fees at an ATM that one time you used an out network bank.